DOC: lrange, lzip --> list(range and list(zip
TST: util/testing improvements

assertRaises and assertRaisesRegexp are now with-statement-compatible,
refactored assert_panel_equal and removed check_index_freq from
assert_series_equal.
Merge pull request #4450 from jtratner/change-range-zip-in-docs

DOC: lrange, lzip --> list(range and list(zip
Merge pull request #4451 from jtratner/better-assert-tests

TST: pandas/util/testing : test improvements and cleanups
BUG: fix truncation for astype(str)
Merge pull request #4437 from cpcloud/fix-astype-calls

BUG: fix string truncation for astype(str)
DOC: fix tz doc bug
BUG/OFMT: fix spurious tuple repring of bytes types in python 3
CLN: clean up _is_sequence
ENH/CLN: add string and binary types compat object
Merge pull request #4456 from cpcloud/fix-py3-bytes-repr

BUG/OFMT: fix repring of python3 bytes objects