io.fits: issue with long headers when new value is unicode

[keflavich]

Assigning a long (>80char) string to a header keyword works for string values using the CONTINUE keyword with &:

newh = pyfits.PrimaryHDU()
newh.header['TEST'] = 'abcdefg' * 30

However, a warning is raised and the string is truncated if the string is unicode:

>>> newh = pyfits.PrimaryHDU()
>>> newh.header['TEST'] = u'abcdefg' * 30
WARNING: VerifyWarning: Card is too long, comment will be truncated. [pyfits.core]

This behavior is inconsistent; I believe the former is preferable.

[embray]

I agree. Could you open this issue directly on PyFITS instead, as this is a PyFITS bug. It will be merged into Astropy anyways, so it should be fixed there first.