improve-output: Only show diff in interactive mode without -always flag

chartsbot.py

@@ -132,6 +132,10 @@ class ChartsBot( ):
         """Update the given page with new text."""
         # only save if something was changed (and not just revision)
         if text != page.get():
+
+            # Show diff only in interactive mode
+            if not self.always:
+
                 # Show the title of the page we're working on.
                 # Highlight the title in purple.
                 pywikibot.output( u"\n\n>>> \03{lightpurple}%s\03{default} <<<"