[Docs] Another round of stylistic fixes.

docs/layout_tests_linux.md

 # Running layout tests on Linux
 
-  1. Build `blink_tests` (see LinuxBuildInstructions)
-  1. Checkout the layout tests
-    * If you have an entry in your .gclient file that includes "LayoutTests", you may need to comment it out and sync.
-    * You can run a subset of the tests by passing in a path relative to `src/third_party/WebKit/LayoutTests/`.  For example, `run_layout_tests.py fast` will only run the tests under `src/third_party/WebKit/LayoutTests/fast/`.
-  1. When the tests finish, any unexpected results should be displayed.
+1.  Build `blink_tests` (see LinuxBuildInstructions)
+1.  Checkout the layout tests
+    *   If you have an entry in your `.gclient` file that includes
+        "LayoutTests", you may need to comment it out and sync.
+    *   You can run a subset of the tests by passing in a path relative to
+        `src/third_party/WebKit/LayoutTests/`.  For example,
+        `run_layout_tests.py fast` will only run the tests under
+        `src/third_party/WebKit/LayoutTests/fast/`.
+1.  When the tests finish, any unexpected results should be displayed.
 
-See [Running WebKit Layout Tests](http://dev.chromium.org/developers/testing/webkit-layout-tests) for full documentation about set up and available options.
+See
+[Running WebKit Layout Tests](http://dev.chromium.org/developers/testing/webkit-layout-tests)
+for full documentation about set up and available options.
 
 ## Pixel Tests
 
-The pixel test results were generated on Ubuntu 10.4 (Lucid).  If you're running a newer version of Ubuntu, you will get some pixel test failures due to changes in freetype or fonts.  In this case, you can create a Lucid 64 chroot using `build/install-chroot.sh` to compile and run tests.
+The pixel test results were generated on Ubuntu 10.4 (Lucid). If you're running
+a newer version of Ubuntu, you will get some pixel test failures due to changes
+in freetype or fonts.  In this case, you can create a Lucid 64 chroot using
+`build/install-chroot.sh` to compile and run tests.
 
 ## Fonts
 
 Make sure you have all the necessary fonts installed.
-```
+
+```shell
 sudo apt-get install apache2 wdiff php5-cgi ttf-indic-fonts \
    msttcorefonts ttf-dejavu-core ttf-kochi-gothic ttf-kochi-mincho \
    ttf-thai-tlwg
 ```
 
 You can also just run `build/install-build-deps.sh` again.
 
 ## Plugins
 
-If `fast/dom/object-plugin-hides-properties.html` and `plugins/embed-attributes-style.html` are failing, try uninstalling `totem-mozilla` from your system:
-```
-sudo apt-get remove totem-mozilla
-```
+If `fast/dom/object-plugin-hides-properties.html` and
+`plugins/embed-attributes-style.html` are failing, try uninstalling
+`totem-mozilla` from your system:
+
+    sudo apt-get remove totem-mozilla
+
 
 ## Running layout tests under valgrind on Linux
 
 As above, but use `tools/valgrind/chrome_tests.sh -t webkit` instead.  e.g.
-```
-sh tools/valgrind/chrome_tests.sh -t webkit LayoutTests/fast/
-```
+
+    sh tools/valgrind/chrome_tests.sh -t webkit LayoutTests/fast/
+
 This defaults to using --debug.  Read the script for more details.
 
-If you're trying to reproduce a run from the valgrind buildbot, look for the --run\_chunk=XX:YY
-line in the bot's log.  You can rerun exactly as the bot did with the commands
-```
+If you're trying to reproduce a run from the valgrind buildbot, look for the
+`--run_chunk=XX:YY` line in the bot's log. You can rerun exactly as the bot did
+with the commands.
+
+```shell
 cd ~/chromium/src
-echo XX >  valgrind_layout_chunk.txt
+echo XX > valgrind_layout_chunk.txt
 sh tools/valgrind/chrome_tests.sh -t layout -n YY
 ```
+
 That will run the XXth chunk of YY layout tests.
 
 ## Configuration tips
-  * Use an optimized content\_shell when rebaselining or running a lot of tests.  ([bug 8475](http://code.google.com/p/chromium/issues/detail?id=8475) is about how the debug output differs from the optimized output.)  `ninja -C out/Release content_shell`
-  * Make sure you have wdiff installed: `sudo apt-get install wdiff` to get prettier diff output
-  * Some pixel tests may fail due to processor-specific rounding errors. Build using a chroot jail with Lucid 64-bit user space to be sure that your system matches the checked in baselines.  You can use `build/install-chroot.sh` to set up a Lucid 64 chroot. Learn more about [UsingALinuxChroot](UsingALinuxChroot.md).
+
+*   Use an optimized `content_shell` when rebaselining or running a lot of
+    tests. ([bug 8475](https://crbug.com/8475) is about how the debug output
+    differs from the optimized output.)
+
+    `ninja -C out/Release content_shell`
+
+*   Make sure you have wdiff installed: `sudo apt-get install wdiff` to get
+    prettier diff output.
+*   Some pixel tests may fail due to processor-specific rounding errors. Build
+    using a chroot jail with Lucid 64-bit user space to be sure that your system
+    matches the checked in baselines.  You can use `build/install-chroot.sh` to
+    set up a Lucid 64 chroot. Learn more about
+    [using a linux chroot](using_a_linux_chroot.md).
+
 ## Getting a layout test into a debugger
 
 There are two ways:
-  1. Run content\_shell directly rather than using run\_layout\_tests.py. You will need to pass some options:
-    * `--no-timeout` to give you plenty of time to debug
-    * the fully qualified path of the layout test (rather than relative to `WebKit/LayoutTests`).
-  1. Or, run as normal but with the `--additional-drt-flag=--renderer-startup-dialog  --additional-drt-flag=--no-timeout --time-out-ms=86400000` flags. The first one makes content\_shell bring up a dialog before running, which then would let you attach to the process via `gdb -p PID_OF_DUMPRENDERTREE`. The others help avoid the test shell and DumpRenderTree timeouts during the debug session.
+
+1.  Run `content_shell` directly rather than using `run_layout_tests.py`. You
+    will need to pass some options:
+    *   `--no-timeout` to give you plenty of time to debug
+    *   the fully qualified path of the layout test (rather than relative to
+        `WebKit/LayoutTests`).
+1.  Or, run as normal but with the
+    `--additional-drt-flag=--renderer-startup-dialog
+    --additional-drt-flag=--no-timeout --time-out-ms=86400000` flags. The first
+    one makes content\_shell bring up a dialog before running, which then would
+    let you attach to the process via `gdb -p PID_OF_DUMPRENDERTREE`. The others
+    help avoid the test shell and DumpRenderTree timeouts during the debug
+    session.
 
 ## Using an embedded X server
 
-If you try to use your computer while the tests are running, you may get annoyed as windows are opened and closed automatically.  To get around this, you can create a separate X server for running the tests.
+If you try to use your computer while the tests are running, you may get annoyed
+as windows are opened and closed automatically.  To get around this, you can
+create a separate X server for running the tests.
 
-  1. Install Xephyr (`sudo apt-get install xserver-xephyr`)
-  1. Start Xephyr as display 4: `Xephyr :4 -screen 1024x768x24`
-  1. Run the layout tests in the Xephyr: `DISPLAY=:4 run_layout_tests.py`
+1.  Install Xephyr (`sudo apt-get install xserver-xephyr`)
+1.  Start Xephyr as display 4: `Xephyr :4 -screen 1024x768x24`
+1.  Run the layout tests in the Xephyr: `DISPLAY=:4 run_layout_tests.py`
 
-Xephyr supports debugging repainting.  See the [Xephyr README](http://cgit.freedesktop.org/xorg/xserver/tree/hw/kdrive/ephyr/README) for details.  In brief:
-  1. `XEPHYR_PAUSE=$((500*1000)) Xephyr ...etc...  # 500 ms repaint flash`
-  1. `kill -USR1 $(pidof Xephyr)`
+Xephyr supports debugging repainting. See the
+[Xephyr README](http://cgit.freedesktop.org/xorg/xserver/tree/hw/kdrive/ephyr/README)
+for details. In brief:
 
-If you don't want to see anything at all, you can use Xvfb (should already be installed).
-  1. Start Xvfb as display 4: `Xvfb :4 -screen 0 1024x768x24`
-  1. Run the layout tests in the Xvfb: `DISPLAY=:4 run_layout_tests.py`
+1.  `XEPHYR_PAUSE=$((500*1000)) Xephyr ...etc...  # 500 ms repaint flash`
+1.  `kill -USR1 $(pidof Xephyr)`
+
+If you don't want to see anything at all, you can use Xvfb (should already be
+installed).
+
+1.  Start Xvfb as display 4: `Xvfb :4 -screen 0 1024x768x24`
+1.  Run the layout tests in the Xvfb: `DISPLAY=:4 run_layout_tests.py`
 
 ## Tiling Window managers
 
-The layout tests want to run with the window at a particular size down to the pixel level.  This means if your window manager resizes the window it'll cause test failures.  This is another good reason to use an embedded X server.
+The layout tests want to run with the window at a particular size down to the
+pixel level.  This means if your window manager resizes the window it'll cause
+test failures.  This is another good reason to use an embedded X server.
 
 ### xmonad
-In your `.xmonad/xmonad.hs`, change your config to include a manageHook along these lines:
+
+In your `.xmonad/xmonad.hs`, change your config to include a manageHook along
+these lines:
+
 ```
 test_shell_manage = className =? "Test_shell" --> doFloat
 main = xmonad $
   defaultConfig
     { manageHook = test_shell_manage <+> manageHook defaultConfig
     ...
-```
+```