Patch by Nathan Harold.

The example actually uses the sort method of list object.

help.txt, replaced by help.html, is out-of-date and should not be used.
Its dedicated viewer has be replaced by the html viewer in help.py.
'import idlever; I = idlever.IDLE_VERSION' is the same as
'import sys; I = version[:version.index(' ')]'

[merge from 3.5] issue27043 - Explain the inspect.cleandoc behavior on synopsis line and other lines.

Patch contributed by Nathan Harold.

Patch contributed by Nathan Harold.

Also merge changes from Issue #27117; no actual code changes to 3.6.

Factor out code for configuring text widget colors to a new function.

Factor out code for configuring text widget colors to a new function.