VSCode: update documentation to handle Linux underscore bug.

Bug: 921548
Change-Id: I1406ddf0284dac2d007d71f4b7acac23d72c6a63
Reviewed-on: https://chromium-review.googlesource.com/c/1436203
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Auto-Submit: Mounir Lamouri <mlamouri@chromium.org>
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626157}

docs/vscode.md

@@ -55,19 +55,40 @@ terminal. The argument to `code` is the base directory of the workspace. VS
 Code does not require project or solution files. However, it does store
 workspace settings in a `.vscode` folder in your base directory.
 
-### Git on Windows
+
+### Fixes for Known Issues
+
+#### Git on Windows
 
 If you only have the `depot_tools` Git installed on your machine, even though it
 is in your PATH, VS Code will ignore it as it seems to be looking for `git.exe`.
 You will have to add the following to your settings in order for the Git
 integration to work:
 
-```
+```json
 {
   "git.path": "C:\\src\\depot_tools\\git.bat"
 }
 ```
 
+#### Rendering of underscore on Linux
+
+As mentioned in [#35901](https://github.com/Microsoft/vscode/issues/35901), VS
+Code will not show underscore (`_`) properly on Linux by default. You can work
+around this issue by forcing another font such as the default `monospace` or
+changing the font size in your settings:
+
+```json
+{
+  // If you want to use the default "monospace" font:
+  //"terminal.integrated.fontFamily": "monospace"
+  // If you would rather just increase the size of the font:
+  //"terminal.integrated.fontSize": 15
+  // If you would rather decrease the size of the font:
+  //"terminal.integrated.fontSize": 15
+}
+```
+
 ### Useful Extensions
 
 Up to now, you have a basic version of VS Code without much language support.