Escape correctly file names in windows.

In windows when expanding snippets the names of the snippet files look weird because \ is not escaped properly.

Also I think there should be an option to show only part of the file name, say the path relative to ~/.vim, because this way most of the screen is taken with the paths of the file.

Going even further I think it would it look nicer if you had some kind of alignment for the string. Say "%2i: %-15s (%s)".
Of course this last suggestion might not be consensual, but maybe a option might be offered to the user.
Properly escape locations on windows.