Issue #26778: Fixed "a/an/and" typos in code comment and documentation.
diff --git a/Lib/lib-tk/Tkdnd.py b/Lib/lib-tk/Tkdnd.py
index 2e37d9e..1b09f91 100644
--- a/Lib/lib-tk/Tkdnd.py
+++ b/Lib/lib-tk/Tkdnd.py
@@ -3,7 +3,7 @@
 This is very preliminary.  I currently only support dnd *within* one
 application, between different windows (or within the same window).
 
-I an trying to make this as generic as possible -- not dependent on
+I am trying to make this as generic as possible -- not dependent on
 the use of a particular widget or icon type, etc.  I also hope that
 this will work with Pmw.