bug#8439: [PATCH] ffap.el -- detect paths with spaces (v2)

[Eli Zaretskii]

> From: Jari Aalto <jari.aalto@cante.net>
> Date: Fri, 19 Oct 2012 10:39:36 +0300
> Cc: Yigal Hochberg <hochberg@dmhsoftware.com>
> 
> 
> With some more field testing, the following patch works better.
> 
>   1. New variable ffap-paths-with-spaces controls if the behavior is in use.
>      By default it is set to "t" in Windows/Cygwin where spaces in paths
>      are encountered.

GNU Coding Standards frown upon using "path" for anything except
PATH-style lists of directories.  Use "file name" or "leading
directories" instead.

>   2. The "path skipping" is based on finding longest distance:
> 
>      - from first "drive letter", "/" or "\"
>      - until last "/", "\" followed by last 
> non-matching-char-not-usually-found-in-file-names

What will this do to text such as the one below?

 C:\emacs\bin\prog1.exe on Windows or /usr/bin/prog1 on Unix.

>   3. In Cygwin Emacs the paths are expected to be in "/cygdrive/<letter>/"
>      format.

What about Posix-standard /foo/bar/baz, which is the usual case on
Cygwin?