sourcepos not correct for inline code

[digitalmoksha]

It seems that the sourcepos for inline code is slightly off. It doesn't seem to take into account the surrounding backticks.

Case	Markdown	Sourcemap
Bold	**bold**	<p dir="auto" data-sourcepos="1:1-1:8"> <strong data-sourcepos="1:1-1:8">bold</strong> </p>
Italic	_italic_	<p dir="auto" data-sourcepos="1:1-1:8"> <em data-sourcepos="1:1-1:8">italic</em> </p>
Code (current)	`code`	<p dir="auto" data-sourcepos="1:1-1:6"> <code data-sourcepos="1:2-1:5">code</code> </p>
Code (expected)	`code`	<p dir="auto" data-sourcepos="1:1-1:6"> <code data-sourcepos="1:1-1:6">code</code> </p>
Nested backticks (current)	`` `nested backticks` ``	<p dir="auto" data-sourcepos="1:1-1:24"> <code data-sourcepos="1:3-1:22">`nested backticks`</code> </p>
Nested backticks (expected)	`` `nested backticks` ``	<p dir="auto" data-sourcepos="1:1-1:24"> <code data-sourcepos="1:1-1:24">`nested backticks`</code> </p>

This assumes that the sourcepos of an inline such as strong or emphasis, or inline code, should include the surrounding syntax characters, the backticks in the case of inline code.