Fix ansispan() to ignore stray [0m
Use more yellowish color for ansiyellow
Test IPython.utils.fixConsole() (really ansispan())
IPython.{util->utils}.fixConsole() in html/tests/base
Update static/style/{ipython,style}.min.css
Merge pull request #6653 from mattpap/fix_ansispan

Fix IPython.utils.ansispan() to ignore stray [0m