[Bugfix] Fix the backticks bug

[Kyle-Ye]

See more info and context here swiftlang#26

In brief:
When parse "`A" and "``A"
Before the PR: We'll get text sourcepos 1:2-1:2 and 1:3-1:3
After the PR: We'll get text sourcepos 1:1-1:2 and 1:1-1:3

[jgm]

Looks good -- I'd only ask that we have init_pos instead of initPos for consistency with the style of the rest of the code.

[Kyle-Ye]

Looks good -- I'd only ask that we have init_pos instead of initPos for consistency with the style of the rest of the code.

cmark/src/inlines.c

Lines 394 to 397 in a8da5a2

	static cmark_node *handle_backticks(subject *subj, int options) {
	cmark_chunk openticks = take_while(subj, isbacktick);
	bufsize_t startpos = subj->pos;
	bufsize_t endpos = scan_to_closing_backticks(subj, openticks.len);

Seems like initpos would better fit the position here.(startpos and endpos)

init_pos or initpos which do you prefer @jgm

[jgm]

Yes, initpos would be better.

[Kyle-Ye]

Yes, initpos would be better.

Done.

[Kyle-Ye]

Could we run test on it again and merge it. cc @jgm

[jgm]

Thanks for this!