[meld/flatpak-ci] Update comment for flake8

[Kai Willadsen <kaiw src gnome org>]

commit e3fb7e37811a029918fca33caa7a41f6f6f16fe1
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Sep 29 07:36:25 2019 +1000

    Update comment for flake8

 bin/meld | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/bin/meld b/bin/meld
index df6ab95d..7a6ab4e8 100755
--- a/bin/meld
+++ b/bin/meld
@@ -160,8 +160,8 @@ def show_error_and_exit(error_text):
             text=error_text,
         ).run()
     except Exception:
-        # Although tkinter is imported here, it isn't meld's dependency:
-        # if found it is used to show GUI error about lacking true dependencies.
+        # tkinter is imported here only to show a UI warning about
+        # missing dependencies.
         try:
             if sys.version_info < (3, 0):
                 from Tkinter import Tk