On windows, git gui fails to correctly extract the aspell version
(experienced with aspell version 0.50.3) due to scilent white space at
the end of the version string. Trim the obtained version string to
work around this.
Signed-off-by: Gustaf Hendeby <hendeby@isy.liu.se> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>