0.18
[MRG + 1] More versionadded everywhere! (#7403) * insert versionadded versionchanged directives in docstrings for 0.18 indicate where exception classes were moved from * moved versionadded in the proper places
[MRG + 1] More versionadded everywhere! (#7403) * insert versionadded versionchanged directives in docstrings for 0.18 indicate where exception classes were moved from * moved versionadded in the proper places