This allows whitespace and any other text on the line when changing drive letters.
Mostly I expect it crops up when commands are concatenated and the readability
whitespace is added to the end of the command. For example C: & dir results in
"C: " and "dir" as the two commands. We cannot unconditionally remove whitespace
as some commands rely on it.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=40694Signed-off-by: Jason Edmeades <us@edmeades.me.uk>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>