Fix typo found by Min ho Kim (#14879)

terryjreedy · web-flow · commit 8e3a7380ecb3 · 2019-07-21T15:24:45.000-04:00
diff --git a/Lib/idlelib/help.py b/Lib/idlelib/help.py
@@ -257,7 +257,7 @@ def copy_strip():
     same, help.html can be backported.  The internal Python version
     number is not displayed.  If maintenance idle.rst diverges from
     the master version, then instead of backporting help.html from
-    master, repeat the proceedure above to generate a maintenance
+    master, repeat the procedure above to generate a maintenance
     version.
     """
     src = join(abspath(dirname(dirname(dirname(__file__)))),
