BUG: interpolate with no nans and limit
BUG: Bug in putting a PeriodIndex into a Series would convert to int64 dtype, rather than object of Periods (GH7932)
Merge pull request #8235 from TomAugspurger/interp-limit-nonan

BUG: interpolate with no nans and limit
BUG: DataFrame.to_string ignores col_space when header=False

Add test case for when header=False

Make col_space the minimum width of each col

Update release notes
Merge pull request #8237 from jreback/pi

BUG: Bug in putting a PeriodIndex into a Series would convert to int64
ENH: TimedeltaIndex and Timedelta scalar support (GH3009)

BUG: coercion of timedeltas in assignment (GH8209)

TST: skip sql.timedelta tests for now

COMPAT: provide conversion for passing in non-ns datetime64/timedelta64

BUG: diff on Dataframe with timedelta64 broken (GH4533)
fix from comments