Tony Breeds 948c8b942d Fix update_upper_constraints removing additional ' ' char
In update_upper_constraints the sed substitution matches on a ' ' char after
the UPPER_CONSTRAINTS_FILE consumes.  This creates bad changes such as [1].
Compare the manual correction at [2].

[1] https://review.openstack.org/#/c/364973/1/tox.ini@17
[2] https://review.openstack.org/#/c/364973/1..2/tox.ini,unified

Change-Id: I532150534813d23fbe9495c748ddef5e83be4739
2016-09-05 09:18:52 +10:00
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