message: Update source map documentation in debugger-launchjson
  Update source map example to escape the backslash
diff: @@ -63,7 +63,7 @@ When this is set to `externalTerminal` the target process will run in a separate
  You can optionally configure a file by file mapping by providing map following this schema:
  "sourceFileMap": {
  - "C:\foo":"/home/me/foo"
  + "C:\\foo":"/home/me/foo"
  }
  ## Symbol Path
  