Add test of unsafe HTML in stash with safe_mode='excape'
Add test of unsafe HTML in stash with safe_mode='excape'

This should give us 100% coverage of postprocessors.py.

cyisfor/Python-Markdown,me-and/Python-Markdown,joachimneu/Python-Markdown,cyisfor/Python-Markdown,fernandezcuesta/Python-Markdown,evertqin/Python-Markdown,zestedesavoir/Python-ZMarkdown,me-and/Python-Markdown,Situphen/Python-ZMarkdown,evertqin/Python-Markdown,dataquestio/Python-Markdown,joachimneu/Python-Markdown,Situphen/Python-ZMarkdown,cyisfor/Python-Markdown,waylan/Python-Markdown,gogobook/Python-Markdown,zestedesavoir/Python-ZMarkdown,Situphen/Python-ZMarkdown,evertqin/Python-Markdown,fernandezcuesta/Python-Markdown,joachimneu/Python-Markdown,waylan/Python-Markdown,fernandezcuesta/Python-Markdown,dataquestio/Python-Markdown,me-and/Python-Markdown,gogobook/Python-Markdown,dataquestio/Python-Markdown,gogobook/Python-Markdown,zestedesavoir/Python-ZMarkdown