DOC: logit and expit docstrings -- fix typo and add versionadded
MAINT: run generate_ufuncs.py
MAINT: remind old scipy 0.10.0 release notes about logit and expit
Merge pull request #3026 from argriffing/expit-logit-docstrings

DOC: logit and expit docstrings -- fix typo and add versionadded