Fix typos and regularize formatting in `weave.inline` docstring.
Merge pull request #2892 from bgrant/master

DOC:  Fix typos and regularize formatting in `weave.inline` docstring.
ENH: compute mask in nanstd/nanmean only once
BUG: avoid nasty surprises with trmm wrapper

Add a `copy` attribute so that a user can control whether
an array is copied or modified in place.
Merge pull request #2899 from EvgeniBurovski/trmm_

BUG: avoid nasty surprises with trmm wrapper
Merge pull request #2896 from cpcloud/master

ENH: compute mask in nanstd/nanmean only once