bug with ** and `

[summivox]

Testcase:

**a`b**c`d**

The middle

`b**c`

Should really be inline <code>, but now marked outputs:

<p><strong>a`b</strong>c`d**</p>

Expected:

<p><strong>a<code>b**c</code>d</strong></p>

[maxkorp]

Took a quick look at this. I'm not much with regexes, so I've not had much luck yet, but a bit of an observation at least.
Even flipping the code/strong markdown, it still breaks. However, if you use EMs in place of the strong tag, it works, ie

_a**b_c**d_

whereas

**a_b**c_d**

does not. So the same error exists within both the regex for strong tags and inline code tags, but not in the regex for em tags.

[summivox]

As I also submitted a PR on adding math, I must admit that using regex is not that brilliant, after all.
It looks like a pushdown-automata equivalent to me (rather than regular), although with current regex I doubt it's still doable, just it takes some careful reasoning (and probably rewriting, too).
Fortunately I heard some brilliant guys are working on a unified markdown standard that could hopefully iron out all these subtle differences and bugs.

[joshbruce]

Closing as not part of the current focus and possibly covered by spec compliance work, see also #1106 and #1216.