merging 1.3.x broke build on master

[tacaswell]

The issues is with matplotlib.tests.test_streamplot.test_streamplot_limits and matplotlib.tests.test_collections.test_barb_limits which passed on 1.3.x before the merge.

@pelson Can you take a look at this?

Related to #2444

[pelson]

@pelson Can you take a look at this?

Sure.

Looks like the numbers are pretty close:

Arrays are not almost equal to 2 decimals

(mismatch 25.0%)
 x: array([ 19.99259073,  29.99042969,  15.01481855,   6.01914062])
 y: array([20, 30, 15,  6])

Dropping this from 2 decimals to 1 would be sufficient - the fact is that streamplot will not result in exact limits as it is the extents of the resulting paths which are used, not the input data itself.

The same issue applies to the barb test.

[tacaswell]

Merged the PR, but I am still a bit concerned that it passed on 1.3.x before the merge, but not on master.