[issue27465] IDLE:Make help source menu entries unique and sorted.

Thu Jul 7 22:10:03 EDT 2016

Terry J. Reedy added the comment:

The IDLE doc currently says "Additional help sources may be added here with the Configure IDLE dialog under the General tab."  Revise to something like

Additional help sources
   Menu items for display here are added on the General tap of Options => Configure IDLE.  Menu entries should be unique (new in 3.6) and will be sorted. Documents can be located either on the current machine or on the internet.  The allowed file types may depend on the system.  Local file paths are checked when submitted; internet addresses are not.

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dependencies: +IDLE: add base Query dialog with ttk widgets

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<http://bugs.python.org/issue27465>
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