[docs] [issue20769] Reload() description is unclear

[R. David Murray]

R. David Murray added the comment:

The python3 docs say:

"It is legal though generally not very useful to reload built-in or dynamically loaded modules (this is not true for e.g. sys, __main__, builtins and other key modules where reloading is frowned upon)."

So, it is the former...sort of.  You don't get an error when you reload them, so implying that it is not "legal" is an odd phrasing.  Probably that sentence should be clarified in both the python2 and python3 docs.

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