Default help page
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---
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format: Markdown
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...
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# Navigating
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The most natural way of navigating is by clicking wiki links that
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connect one page with another. The "Front page" link in the navigation
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bar will always take you to the Front Page of the wiki. The "All pages"
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link will take you to a list of all pages on the wiki (organized into
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folders if directories are used). Alternatively, you can search using
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the search box. Note that the search is set to look for whole words, so
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if you are looking for "gremlins", type that and not "gremlin".
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The "go" box will take you directly to the page you type.
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# Creating and modifying pages
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## Registering for an account
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In order to modify pages, you'll need to be logged in. To register
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for an account, just click the "register" button in the bar on top
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of the screen. You'll be asked to choose a username and a password,
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which you can use to log in in the future by clicking the "login"
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button. While you are logged in, these buttons are replaced by
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a "logout so-and-so" button, which you should click to log out
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when you are finished.
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Note that logins are persistent through session cookies, so if you
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don't log out, you'll still be logged in when you return to the
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wiki from the same browser in the future.
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## Editing a page
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To edit a page, just click the "edit" button at the bottom right corner
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of the page.
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You can click "Preview" at any time to see how your changes will look.
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Nothing is saved until you press "Save."
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Note that you must provide a description of your changes. This is to
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make it easier for others to see how a wiki page has been changed.
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## Page metadata
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Pages may optionally begin with a metadata block. Here is an example:
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---
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format: latex+lhs
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categories: haskell math
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toc: no
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title: Haskell and
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Category Theory
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...
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\section{Why Category Theory?}
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The metadata block consists of a list of key-value pairs, each on a
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separate line. If needed, the value can be continued on one or more
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additional line, which must begin with a space. (This is illustrated by
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the "title" example above.) The metadata block must begin with a line
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`---` and end with a line `...` optionally followed by one or more blank
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lines.
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Currently the following keys are supported:
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format
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: Overrides the default page type as specified in the configuration file.
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Possible values are `markdown`, `rst`, `latex`, `html`, `markdown+lhs`,
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`rst+lhs`, `latex+lhs`. (Capitalization is ignored, so you can also
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use `LaTeX`, `HTML`, etc.) The `+lhs` variants indicate that the page
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is to be interpreted as literate Haskell. If this field is missing,
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the default page type will be used.
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categories
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: A space or comma separated list of categories to which the page belongs.
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toc
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: Overrides default setting for table-of-contents in the configuration file.
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Values can be `yes`, `no`, `true`, or `false` (capitalization is ignored).
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title
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: By default the displayed page title is the page name. This metadata element
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overrides that default.
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## Creating a new page
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To create a new page, just create a wiki link that links to it, and
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click the link. If the page does not exist, you will be editing it
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immediately.
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## Reverting to an earlier version
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If you click the "history" button at the bottom of the page, you will
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get a record of previous versions of the page. You can see the differences
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between two versions by dragging one onto the other; additions will be
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highlighted in yellow, and deletions will be crossed out with a horizontal
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line. Clicking on the description of changes will take you to the page
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as it existed after those changes. To revert the page to the revision
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you're currently looking at, just click the "revert" button at the bottom
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of the page, then "Save".
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## Deleting a page
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The "delete" button at the bottom of the page will delete a page. Note
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that deleted pages can be recovered, since a record of them will still be
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accessible via the "activity" button on the top of the page.
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# Uploading files
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To upload a file--a picture, a PDF, or some other resource--click the
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"upload" button in the navigation bar. You will be prompted to select
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the file to upload. As with edits, you will be asked to provide a
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description of the resource (or of the change, if you are overwriting
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an existing file).
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Often you may leave "Name on wiki" blank, since the existing name of the
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file will be used by default. If that isn't desired, supply a name.
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Note that uploaded files *must* include a file extension (e.g. `.pdf`).
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If you are providing a new version of a file that already exists on the
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wiki, check the box "Overwrite existing file." Otherwise, leave it
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unchecked.
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To link to an uploaded file, just use its name in a regular wiki link.
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For example, if you uploaded a picture `fido.jpg`, you can insert the
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picture into a (markdown-formatted) page as follows: ``.
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If you uploaded a PDF `projection.pdf`, you can insert a link to it
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using: `[projection](projection.pdf)`.
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# Markdown
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This wiki's pages are written in [pandoc]'s extended form of [markdown].
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If you're not familiar with markdown, you should start by looking
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at the [markdown "basics" page] and the [markdown syntax description].
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Consult the [pandoc User's Guide] for information about pandoc's syntax
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for footnotes, tables, description lists, and other elements not present
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in standard markdown.
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[pandoc]: http://johnmacfarlane.net/pandoc
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[pandoc User's Guide]: http://johnmacfarlane.net/pandoc/README.html
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[markdown]: http://daringfireball.net/projects/markdown
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[markdown "basics" page]: http://daringfireball.net/projects/markdown/basics
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[markdown syntax description]: http://daringfireball.net/projects/markdown/syntax
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Markdown is pretty intuitive, since it is based on email conventions.
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Here are some examples to get you started:
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<table>
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<tr>
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<td>`*emphasized text*`</td>
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<td>*emphasized text*</td>
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</tr>
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<tr>
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<td>`**strong emphasis**`</td>
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<td>**strong emphasis**</td>
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</tr>
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<tr>
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<td>`` `literal text` ``</td>
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<td>`literal text`</td>
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</tr>
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<tr>
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<td>`\*escaped special characters\*`</td>
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<td>\*escaped special characters\*</td>
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</tr>
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<tr>
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<td>`[external link](http://google.com)`</td>
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<td>[external link](http://google.com)</td>
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</tr>
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<tr>
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<td>``</td>
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<td></td>
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</tr>
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<tr>
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<td>Wikilink: `[Front Page]()`</td>
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<td>Wikilink: [Front Page]()</td>
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</tr>
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<tr>
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<td>`H~2~O`</td>
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<td>H~2~O</td>
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</tr>
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<tr>
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<td>`10^100^`</td>
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<td>10^100^</td>
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</tr>
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<tr>
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<td>`~~strikeout~~`</td>
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<td>~~strikeout~~</td>
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</tr>
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<tr>
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<td>
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`$x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}$`
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</td>
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<td>
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$x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}$^[If this looks like
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code, it's because jsMath is
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not installed on your system. Contact your administrator to request it.]
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</td>
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</tr>
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<tr>
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<td>
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`A simple footnote.^[Or is it so simple?]`
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</td>
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<td>
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A simple footnote.^[Or is it so simple?]
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</td>
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</tr>
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<tr>
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<td>
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<pre>
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> an indented paragraph,
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> usually used for quotations
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</pre>
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</td>
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<td>
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> an indented paragraph,
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> usually used for quotations
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</td>
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<tr>
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<td>
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<pre>
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#!/bin/sh -e
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# code, indented four spaces
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echo "Hello world"
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</pre>
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</td>
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<td>
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#!/bin/sh -e
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# code, indented four spaces
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echo "Hello world"
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</td>
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</tr>
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<tr>
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<td>
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<pre>
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* a bulleted list
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* second item
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- sublist
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- and more
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* back to main list
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1. this item has an ordered
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2. sublist
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a) you can also use letters
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b) another item
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</pre>
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</td>
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<td>
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* a bulleted list
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* second item
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- sublist
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- and more
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* back to main list
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1. this item has an ordered
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2. sublist
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a) you can also use letters
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b) another item
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</td>
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</tr>
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<tr>
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<td>
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<pre>
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Fruit Quantity
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-------- -----------
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apples 30,200
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oranges 1,998
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pears 42
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Table: Our fruit inventory
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</pre>
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</td>
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<td>
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Fruit Quantity
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-------- -----------
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apples 30,200
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oranges 1,998
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pears 42
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Table: Our fruit inventory
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</td>
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</tr>
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</table>
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For headings, prefix a line with one or more `#` signs: one for a major heading,
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two for a subheading, three for a subsubheading. Be sure to leave space before
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and after the heading.
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# Markdown
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Text...
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## Some examples...
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Text...
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## Wiki links
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Links to other wiki pages are formed this way: `[Page Name]()`.
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(Gitit converts markdown links with empty targets into wikilinks.)
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To link to a wiki page using something else as the link text:
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`[something else](Page Name)`.
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Note that page names may contain spaces and some special characters.
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They need not be CamelCase. CamelCase words are *not* automatically
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converted to wiki links.
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Wiki pages may be organized into directories. So, if you have
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several pages on wine, you may wish to organize them like so:
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Wine/Pinot Noir
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Wine/Burgundy
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Wine/Cabernet Sauvignon
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Note that a wiki link `[Burgundy]()` that occurs inside the `Wine`
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directory will link to `Wine/Burgundy`, and not to `Burgundy`.
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To link to a top-level page called `Burgundy`, you'd have to use
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`[Burgundy](/Burgundy)`.
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To link to a directory listing for a subdirectory, use a trailing
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slash: `[Wine/]()` will link to a listing of the `Wine` subdirectory.
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