[Docs] fixes

docs/linux_build_instructions.md

-# Build instructions for Linux
+# Build instructions for Linux
 
 [TOC]
 
 ## Overview
 
 Due its complexity, Chromium uses a set of custom tools to check out and build.
 Here's an overview of the steps you'll run:
 
 1.  **gclient**. A checkout involves pulling nearly 100 different SVN
     repositories of code.  This process is managed with a tool called `gclient`.
 1.  **gyp**. The cross-platform build configuration system is called `gyp`, and
     on Linux it generates ninja build files.  Running `gyp` is analogous to the
     `./configure` step seen in most other software.
 1.  **ninja**. The actual build itself uses `ninja`. A prebuilt binary is in
     `depot_tools` and should already be in your path if you followed the steps
     to check out Chromium.
 1.  We don't provide any sort of "install" step.
 1.  You may want to [use a chroot](using_a_linux_chroot.md) to isolate yourself
     from versioning or packaging conflicts (or to run the layout tests).
 
 ## Getting a checkout
 
 *   [Prerequisites](linux_build_instructions_prerequisites.md): what you need
     before you build.
 *   [Get the Code](http://dev.chromium.org/developers/how-tos/get-the-code):
     check out the source code.
 
-**Note**. If you are working on Chromium OS and already have sources in
+*** note
+Note: if you are working on Chromium OS and already have sources in
 `chromiumos/chromium`, you **must** run `chrome_set_ver --runhooks` to set the
 correct dependencies. This step is otherwise performed by `gclient` as part of
 your checkout.
+***
 
 ## First Time Build Bootstrap
 
 *   Make sure your dependencies are up to date by running the
     `install-build-deps.sh` script:
 
     .../chromium/src$ build/install-build-deps.sh
 
 *   Before you build, you should also
     [install API keys](https://sites.google.com/a/chromium.org/dev/developers/how-tos/api-keys).
@@ skipping 171 matching lines @@
 *   Want to use Eclipse as your IDE? See
     [LinuxEclipseDev](linux_eclipse_dev.md).
 *   Built version as Default Browser? See
     [LinuxDevBuildAsDefaultBrowser](linux_dev_build_as_default_browser.md).
 
 ## Next Steps
 
 If you want to contribute to the effort toward a Chromium-based browser for
 Linux, please check out the [Linux Development page](linux_development.md) for
 more information.