Fixing typos in comments. Conflicts:
Fixing typos in comments.
Conflicts:

	markdown.php

drosenstark/php-markdown,mariokonrad/php-markdown,MWDelaney/bootstrap-3-shortcodes,filipstefansson/bootstrap-3-shortcodes,queirozfcom/php-markdown-with-syntax-highlight,filipstefansson/bootstrap-3-shortcodes,nazar-pc/php-markdown-next,n054/php-markdown,jockchou/php-markdown,ashur/php-markdown,MWDelaney/bootstrap-3-shortcodes,MWDelaney/bootstrap-3-shortcodes,robbieaverill/php-markdown,Kapeli/php-markdown,itafroma/php-markdown