• VSCode Version: 1.7.1
• OS Version: Windows 10 Pro

Steps to Reproduce:

1. Set git bash as default terminal:
   File -> Preferences -> User Settings, add
   "terminal.integrated.shell.windows": "C:\Program Files\Git\bin\bash.exe"
   at settings.json.
2. Open git bash by Ctrl + `.
3. Type some characters wrapped with ""

Expected:
"123123123123"
Result:
"12312"3123"123"