fix typo that wasn't properly fixed in revision 1.144
diff --git a/Doc/perl/python.perl b/Doc/perl/python.perl
index d5d000f..c4bd400 100644
--- a/Doc/perl/python.perl
+++ b/Doc/perl/python.perl
@@ -2078,7 +2078,7 @@
     return codetext($_);
 }
 
-# List of all filenames produced my do_cmd_verbatiminput()
+# List of all filenames produced by do_cmd_verbatiminput()
 %VerbatimFiles = ();
 @VerbatimOutputs = ();