gitk: Adjust two equal strings which differed in whitespace

There were the two strings "SHA1 ID: " and "SHA1 ID:" as description
for the SHA1 search textbox.  Change it to two equal strings, the
space is now outside of the translated string.

Furthermore the German translation wasn't unique, but "SHA1:" resp.
"SHA1-Hashwert:". The former was displayed after initialisation, the
latter after changes to the textbox, for example when clearing the text.
But it was too long to be displayed fully, so use a shorter translation.
Signed-off-by: NMarkus Heidelberg <markus.heidelberg@web.de>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

gitk

@@ -2088,7 +2088,7 @@ proc makewindow {} {
     set sha1entry .tf.bar.sha1
     set entries $sha1entry
     set sha1but .tf.bar.sha1label
-    button $sha1but -text [mc "SHA1 ID: "] -state disabled -relief flat \
+    button $sha1but -text "[mc "SHA1 ID:"] " -state disabled -relief flat \
 	-command gotocommit -width 8
     $sha1but conf -disabledforeground [$sha1but cget -foreground]
     pack .tf.bar.sha1label -side left

po/de.po

@@ -708,7 +708,7 @@ msgstr "Gehe zu:"
 
 #: gitk:7821
 msgid "SHA1 ID:"
-msgstr "SHA1-Hashwert:"
+msgstr "SHA1 ID:"
 
 #: gitk:7840
 #, tcl-format