Issue #26778: Fixed "a/an/and" typos in code comment and documentation.
diff --git a/Lib/optparse.py b/Lib/optparse.py
index 432a2eb..5bc9051 100644
--- a/Lib/optparse.py
+++ b/Lib/optparse.py
@@ -1361,7 +1361,7 @@
sys.argv[1:]). Any errors result in a call to 'error()', which
by default prints the usage message to stderr and calls
sys.exit() with an error message. On success returns a pair
- (values, args) where 'values' is an Values instance (with all
+ (values, args) where 'values' is a Values instance (with all
your option values) and 'args' is the list of arguments left
over after parsing options.
"""