comfort pads inline code that starts or ends with a space
With format_markdown = true, comfort formats Markdown through comrak's format_commonmark, which adds a space inside each backtick delimiter whenever an inline code span starts or ends with a space:
`# ` becomes ` # `
`a ` becomes ` a `
` a` becomes ` a `CommonMark strips one leading and one trailing space from a code span that has a space at both ends, so each pair renders the same HTML. In the Markdown source, however, the padded span looks like a different literal in the file and in diffs, and deleting the apparent extra space by hand changes the rendered output.
Found while amending RFD 121, where a code span containing # and a trailing space was padded and had to be reworded. The same padding appeared in this ticket's first draft. With default options comfort leaves code spans untouched; only format_markdown runs comrak's writer.
Fix
Pad code-span delimiters with a space only when CommonMark requires it: when the literal starts or ends with a backtick, or starts and ends with a space around non-space content. Comfort already post-processes comrak's output to restore reference links, so code-span rewriting can run in the same pipeline. Add tests covering the three cases above and verifying that the rendered HTML is unchanged.