Smartypants outputs wrong quote after emphasis

[rriegs]

Describe the bug With smartypants: true, input with straight quotes immediately after an emphasis marker at the end of a word outputs curly quotes facing the wrong way (i.e. an open quote rather than an end quote). This occurs for both single and double quotes and both * and _ used singly, doubled, or in combination.

(This is distinct from #1358, which instead concerns emphasis markers outside the quotation marks.)

To Reproduce

"*test*"

incorrectly outputs

“<em>test</em>“

with the trailing quote facing the wrong way. (Almost invisible in GitHub's font, unfortunately.)

Expected behavior The above should instead output

“<em>test</em>”

with the trailing quote as an end quote.