- Add fenced code block tracking to the wrap-pass in index_lines().
line_style is reset to PLAIN at every ``` delimiter, and all segs
inside a fenced block get init_style=PLAIN. This prevents emphasis
markers (e.g. _ in __var) inside code blocks from leaking into later
normal text.
- Also carry init_style across wrap continuation segs so that a long
bold/italic line that is wrapped continues with the correct style on
the next segment.
- The fence bitmap pass now only updates in_code[], since init_style is
already set correctly by the wrap pass.
snark13
035d93ab51