Snippet:

import numpy as np
print(repr(np.array(1.)))

Output on 1.12.1:

array(1.0)

Output on master:

array( 1.0)

Note the space before 1.0.

git bisect gives that the commit introducing the change is d2b06fe.

Probably not such a big deal, but I guess it was not intentional. We noticed because it was breaking one of our doctest on scikit-learn.