pub fn scan_shortcode_uses(source: &str) -> HashSet<String>Expand description
Scan a Brief source for shortcode invocations. Returns the set of
names referenced. Conservative: catches @name(...), @name[...], and
bare @name followed by whitespace. Used only to decide which files
need recompilation when a template changes — false positives just cause
a redundant recompile, never a missed one.