1. Patch 1196895 Jeff Shute:
   New files are colorized by default, and colorizing is removed when
   saving as non-Python files. Patch 1196895 Jeff Shute
   Closes Python Bugs 775012 and 800432, partial fix IDLEfork 763524

2. Update help.txt for left/right word delete

M CREDITS.txt
M ColorDelegator.py
M EditorWindow.py
M NEWS.txt
M help.txt
diff --git a/Lib/idlelib/EditorWindow.py b/Lib/idlelib/EditorWindow.py
index ed6b1a1..ef825f1 100644
--- a/Lib/idlelib/EditorWindow.py
+++ b/Lib/idlelib/EditorWindow.py
@@ -491,7 +491,7 @@
             self.center()
 
     def ispythonsource(self, filename):
-        if not filename:
+        if not filename or os.path.isdir(filename):
             return True
         base, ext = os.path.splitext(os.path.basename(filename))
         if os.path.normcase(ext) in (".py", ".pyw"):
@@ -532,6 +532,7 @@
     def rmcolorizer(self):
         if not self.color:
             return
+        self.color.removecolors()
         self.per.removefilter(self.undo)
         self.per.removefilter(self.color)
         self.color = None