numpy/numpy — pull request #3518 by charris (2013-07-11 22:54:45+00:00)
Title: MAINT: Use np.errstate context manager.

Now that Python < 2.6 is no longer supported we can use the errstate
context manager in places where constructs like
```
old = seterr(invalid='ignore')
try:
blah
finally:
seterr(**old)
```
were used.