De-'colour'ize stdlib except for idlelib.configDialog.
Tweak docstrigs and comments in affected functions in idlelib.configHandler.
diff --git a/Demo/turtle/demohelp.txt b/Demo/turtle/demohelp.txt
index 7d13763..a49720b 100644
--- a/Demo/turtle/demohelp.txt
+++ b/Demo/turtle/demohelp.txt
@@ -15,7 +15,7 @@
   (1) How to use the demo viewer.
 
   Select a demoscript from the example menu.
-  The (syntax coloured) source code appears in the left
+  The (syntax colored) source code appears in the left
   source code window. IT CANNOT BE EDITED, but ONLY VIEWED!
 
   - Press START button to start the demo.
diff --git a/Demo/turtle/tdemo_chaos.py b/Demo/turtle/tdemo_chaos.py
index d4656f8..6a45d0d 100644
--- a/Demo/turtle/tdemo_chaos.py
+++ b/Demo/turtle/tdemo_chaos.py
@@ -29,8 +29,8 @@
     line(-1, 0, N+1, 0)
     line(0, -0.1, 0, 1.1)
 
-def plot(fun, start, colour):
-    pencolor(colour)
+def plot(fun, start, color):
+    pencolor(color)
     x = start
     jumpto(0, x)
     pendown()