gitk: Quote tag names in event bindings to avoid problems with % chars
gitk: Quote tag names in event bindings to avoid problems with % chars

Tag names that contain a % character require quoting when used in event
bindings or the name may be mis-recognised for percent substitution in
the event script.

Reported-by: Jonathan Nieder <b57189c5f2fd5b3daf3350a77fde90def1080fa5@gmail.com>
Signed-off-by: Pat Thoyts <fe43a83262eef1680511f524a1e74d43c633cffe@users.sourceforge.net>
Signed-off-by: Paul Mackerras <19a0ba370c443ba08d20b5061586430ab449ee8c@samba.org>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git