git-gui: fix typo in lib/blame.tcl

diff --git a/lib/choose_rev.tcl b/lib/choose_rev.tcl
index 5e833a53764ad495f5d7753eb52673e02b73289e..a063c5bc49fc9bad58f7fd78e7446a097ce86b88 100644 (file)
--- a/lib/choose_rev.tcl
+++ b/lib/choose_rev.tcl
@@ -314,7 +314,7 @@ method commit_or_die {} {
                }
 
                set top [winfo toplevel $w]
-               set msg [append [mc "Invalid revision: %s" [get $this]] "\n\n$err"]
+               set msg [strcat [mc "Invalid revision: %s" [get $this]] "\n\n$err"]
                tk_messageBox \
                        -icon error \
                        -type ok \