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-rw-r--r--lib/branch_rename.tcl2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/branch_rename.tcl b/lib/branch_rename.tcl
index d6f040e7a2..166538808f 100644
--- a/lib/branch_rename.tcl
+++ b/lib/branch_rename.tcl
@@ -114,7 +114,7 @@ method _rename {} {
-type ok \
-title [wm title $w] \
-parent $w \
- -message [append [mc "Failed to rename '%s'." $oldname] "\n\n$err"]
+ -message [strcat [mc "Failed to rename '%s'." $oldname] "\n\n$err"]
return
}