gitk: Allow unbalanced quotes/braces in commit headers

When parsing commits, gitk treats the headers of the commit as tcl
lists.  This causes errors if the header contains an unbalanced quote
or open brace.  Splitting the line on spaces allows us to treat it as
a set of words instead of as a tcl list, which prevents errors.

Signed-off-by: Kevin Ballard <kevin@sb.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

gitk

@@ -1601,13 +1601,14 @@ proc parsecommit {id contents listed} {
     set header [string range $contents 0 [expr {$hdrend - 1}]]
     set comment [string range $contents [expr {$hdrend + 2}] end]
     foreach line [split $header "\n"] {
+	set line [split $line " "]
 	set tag [lindex $line 0]
 	if {$tag == "author"} {
 	    set audate [lindex $line end-1]
-	    set auname [lrange $line 1 end-2]
+	    set auname [join [lrange $line 1 end-2] " "]
 	} elseif {$tag == "committer"} {
 	    set comdate [lindex $line end-1]
-	    set comname [lrange $line 1 end-2]
+	    set comname [join [lrange $line 1 end-2] " "]
 	}
     }
     set headline {}