refactored utils.strftime
DOC: fix the Markdown example for static index page URL override
Merge pull request #851 from avaris/better-strftime

refactored utils.strftime
Merge pull request #852 from vene/docfix

DOC: fix the Markdown example for static index page URL override
Fix bug with MacOS in utils.strftime

Force using C89 directives (i.e. mentioned in the Python documentation).
Merge pull request #854 from Rogdham/strftime-bugfix

Fix bug with MacOS in utils.strftime