Teach bash the new features of 'git show'.
Teach bash the new features of 'git show'.

Now that 'git show' accepts ref:path as an argument to specify a
tree or blob we should use the same completion logic as we support
for cat-file's object identifier.

Signed-off-by: Shawn O. Pearce <f01032651c12a22b2103346ba96b3b6b231f9d3c@spearce.org>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

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