broken hash in link to Python strftime docs, in settings doc

[Carl Meyer]

This is about as minor as a doc bug can be, but: the ​TIME_INPUT_FORMATS documentation links to the strftime documentation in the Python docs at this URL: ​http://docs.python.org/library/datetime.html#strftime-behavior

This link works, but the hashtag is no longer correct, so you have to scroll and find the strftime info manually. The correct URL for the strftime details is now: ​http://docs.python.org/library/datetime.html#strftime-strptime-behavior

Either the hashtag should be removed from this link as too fragile, or it should be updated.

[Tryphon]

Pretty trivial indeed. Nevertheless, here's a patch that fixes it.

[Karen Tracey]

(In [13326]) Fixed #13676: Corrected some links into the Python docs. Thanks carljm and Tryphon.