Highlighting fails on single quotes

[nathankeenmelb]

When using a single quote (') within a paragraph - i.e. it's used in normal words (like the word "it's" here) - the highlighting continues in a single colour until the next single quote (through multiple lines, even).

e.g. (sorry couldn't get indenting working here)
body
.container
p It's Friday!
//- Purple from here on until next quote
.container