API: default value for read_excel sheet (GH6573)
TST: enable MySQL tests
ENH/TST: Support for non-ascii encodings in DataFrame.to_excel (GH3710)
Merge branch 'excel_default' of https://github.com/clarkfitzg/pandas into clarkfitzg-excel_default
Merge pull request #6613 from jorisvandenbossche/sql-mysql2

TST: enable MySQL tests
CLN #6589 remove print statements when sep=None is passed to read_csv

Simply removed unneceesary print.
Merge pull request #6615 from mangecoeur/CLN-6589

CLN #6589 remove print statements when sep=None is passed to read_csv
BUG/CLN: fix iloc when positional indexer matched Int64Index keys

Also, drop takeable parameter from reindex(...) function family.