Does normalize reflow mode intentionally skip single long lines?

[sglre6355]

Hello!

I'm trying to use reflow_mode = "normalize" in MD013 to get consistent line wrapping across my markdown files. It works great for combining short lines into properly wrapped paragraphs, but I noticed it doesn't split a single line that exceeds the configured line length.

So for example:

Here we have a very very
very very very very very
very very very very very
very very very very very
very long line of text.

gets formatted into

Here we have a very very very very very very very very very very very very very very very very very
very long line of text.

with [MD013] Paragraph could be normalized to use line length of 100 characters [fixed] using rumdl fmt, but

Here we have a very very very very very very very very very very very very very very very very very very long line of text.

gives [MD013] Line length 123 exceeds 100 characters without a fix.

Using reflow_mode = "default", the same line is correctly split into multiple lines but default mode doesn't combine short lines.

rumdl/src/rules/md013_line_length/mod.rs

Lines 696 to 713 in 717c12c

	let needs_reflow = match config.reflow_mode {
	ReflowMode::Normalize => line_data.len() > 1,
	ReflowMode::SentencePerLine => {
	let sentences = split_into_sentences(&paragraph_text);
	sentences.len() > 1 || line_data.len() > 1
	}
	ReflowMode::SemanticLineBreaks => {
	let sentences = split_into_sentences(&paragraph_text);
	sentences.len() > 1
	|| line_data.len() > 1
	|| collected
	.iter()
	.any(|l| self.calculate_effective_length(lines[l.line_idx]) > config.line_length.get())
	}
	ReflowMode::Default => collected
	.iter()
	.any(|l| self.calculate_effective_length(lines[l.line_idx]) > config.line_length.get()),
	};

Looking at the source, it does seem to be intentional but I just wanted to confirm if this was an actual expected behaviour or whether I am missing something.

Thanks for your help in advance!

[rvben]

Hey @sglre6355 — thanks for the careful read, you found a real gap. At the commit you linked, normalize mode only triggered reflow on multi-line paragraphs, so a single overlong line fell through to the per-line warning emitter (which deliberately omits a fix when reflow is on, expecting paragraph-level reflow to cover it). Not an intentional exclusion, just incomplete coverage.

Fixed in cfa6954 and shipped in v0.1.69 — single overlong lines now reflow the same as multi-line paragraphs. If you're on ≥ 0.1.69 and still seeing the old behaviour, double-check that you have both reflow = true and reflow_mode = "normalize" set; the mode alone isn't enough since reflow defaults to false.

[sglre6355]

Amazing, thank you!