Improved the path-matching Regex

Match any and all paths starting with drive letter (C:\) and ending
with .exe or .bat. Don't wrap anything already in quotes.
Properly quotes:
```
echo y | c:\file space\path.exe --version anem.bat | D:/my docs/foo.bat  &
C:\program files\my documents\node.exe + "C:\porgram files\goo.exe"
```
as
```
echo y | "c:\file space\path.exe" --version anem.bat | "D:/my
docs/foo.bat"  & "C:\program files\my documents\node.exe" + "C:\porgram
files\goo.exe"
```