[docs] [issue15375] Trivial for fix in the subprocess documentation

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset 227a22288688 by R David Murray in branch '2.7':
#15375: remove duplicated word 'child'
http://hg.python.org/cpython/rev/227a22288688

----------
nosy: +python-dev

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15375>
_______________________________________