VS Code Version: 1.6.1
OS Version:1607

Steps to Reproduce:
1.Open visual studio code editor.
2. Open any file and using "Ctrl+1" key navigate to the first vs code editor.
3. Using F1 key navigate to the palette, type "git branch" and "refactor-to-promise" as the branch name
4. Make changes to the code by refactoring, adding/deleting new lines ; observe any Alternative Text Description available for blue/green/red indicators suggesting if code has been changed/new line added/line has been removed.
5. Compare the changes between the HEAD and current file by navigating to View Bar ---> Git ; Navigate to changes and hit ENTER to activate "Diff View" ; Observe any Alternative Test Description available to parse code.

Expected result:
Alternative Text Description for these Color Indications should be there

Actual Result:

1. Red color Indicates -> No of lines Deleted,
   Blue Color Indicates-> No of Lines edited,
   Green Color Indicates->No of New Lines Added
2. Red color Indicates how the code was Originally and Green Color Indicates how the Code got changed to

User Impact:
Blind users might not be knowing these changes as Color is the Only Way of Indicating Changes made in a File.

Attachments: