[issue6285] Silent abort on XP help document display

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

I verified the bug by creating a copy of idlelib/help.txt, making the new help entry, testing it, deleting the copy, and retesting -- IDLE silently disappears. (A copy is necessary because IDLE checks that the file exists and gives a similar message as in the patch before posting the new menu item.) I decided that since a file can get renamed, moved, or deleted for various reasons, failure to open it should be caught.

I them tested my patch, found and fixed an typo-error (yes, testing is good even for simple patches!), found and fixed another bug in one of the two functions, and committed.
r87598, r97599, r87600

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resolution:  -> fixed
status: open -> closed
Added file: http://bugs.python.org/file20209/z6285.diff

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