<p>These should all get escaped: </p> <p>Backslash: \ </p> <p>Backtick: ` </p> <p>Asterisk: * </p> <p>Underscore: _ </p> <p>Left brace: { </p> <p>Right brace: } </p> <p>Left bracket: [ </p> <p>Right bracket: ] </p> <p>Left paren: ( </p> <p>Right paren: ) </p> <p>Greater-than: > </p> <p>Hash: # </p> <p>Period: . </p> <p>Bang: ! </p> <p>Plus: + </p> <p>Minus: - </p> <p>These should not, because they occur within a code block: </p> <pre><code>Backslash: \\ Backtick: \` Asterisk: \* Underscore: \_ Left brace: \{ Right brace: \} Left bracket: \[ Right bracket: \] Left paren: \( Right paren: \) Greater-than: \> Hash: \# Period: \. Bang: \! Plus: \+ Minus: \- </code></pre><p>Nor should these, which occur in code spans: </p> <p>Backslash: <code>\\</code> </p> <p>Backtick: <code>\`</code> </p> <p>Asterisk: <code>\*</code> </p> <p>Underscore: <code>\_</code> </p> <p>Left brace: <code>\{</code> </p> <p>Right brace: <code>\}</code> </p> <p>Left bracket: <code>\[</code> </p> <p>Right bracket: <code>\]</code> </p> <p>Left paren: <code>\(</code> </p> <p>Right paren: <code>\)</code> </p> <p>Greater-than: <code>\></code> </p> <p>Hash: <code>\#</code> </p> <p>Period: <code>\.</code> </p> <p>Bang: <code>\!</code> </p> <p>Plus: <code>\+</code> </p> <p>Minus: <code>\-</code> </p>