tools: make internal link checker more robust

The internal link checker was missing some broken links because it was
being too restrictive about the characters it accepted as part of a link
hash. Accept anything that isn't a terminating quotation mark.

Refs: #39426
Refs: #39425

tools/doc/allhtml.mjs

@@ -76,13 +76,13 @@ fs.writeFileSync(new URL('./all.html', source), all, 'utf8');
 
 // Validate all hrefs have a target.
 const ids = new Set();
-const idRe = / id="(\w+)"/g;
+const idRe = / id="([^"]+)"/g;
 let match;
 while (match = idRe.exec(all)) {
   ids.add(match[1]);
 }
 
-const hrefRe = / href="#(\w+)"/g;
+const hrefRe = / href="#([^"]+)"/g;
 while (match = hrefRe.exec(all)) {
   if (!ids.has(match[1])) throw new Error(`link not found: ${match[1]}`);
 }