Lint: Improve logic for validating algorithm steps. (webmachinelearni…

…ng#727)

* Lint: Improve logic for validating algorithm steps.

Previously, the test ensuring that algorithm steps end in '.' or ':'
looked at the Bikeshed source. This didn't handle word wrapping. While
we prefer not to word wrap, that shouldn't cause this test to fail.

Make the test analyse the DOM instead.

* Fix some unrelated lint failures introduced in f08f9f7

index.bs

@@ -6066,7 +6066,7 @@ partial interface MLGraphBuilder {
     The <dfn method for=MLGraphBuilder>where(|condition|, |trueValue|, |falseValue|)</dfn> method steps are:
   </summary>
     1. If [=this=].{{MLGraphBuilder/[[hasBuilt]]}} is true, then [=exception/throw=] an "{{InvalidStateError}}" {{DOMException}}.
-    1. If [=MLGraphBuilder/validating operand=] with [=this=] and any of |condition|, |input|, and |other| returns false, then [=exception/throw=] a {{TypeError}}.
+    1. If [=MLGraphBuilder/validating operand=] with [=this=] and any of |condition|, |trueValue|, and |falseValue| returns false, then [=exception/throw=] a {{TypeError}}.
     1. If |condition|'s [=MLOperand/dataType=] is not equal to {{MLOperandDataType/"uint8"}}, then [=exception/throw=] a {{TypeError}}.
     1. If |trueValue|'s [=MLOperand/dataType=] is not equal to |falseValue|'s [=MLOperand/dataType=], then [=exception/throw=] a {{TypeError}}.
     1. Let |descriptor| be a new {{MLOperandDescriptor}}.

tools/lint.mjs

@@ -258,18 +258,15 @@ for (const pre of root.querySelectorAll('pre.highlight:not(.idl)')) {
 }
 
 // Ensure algorithm steps end in '.' or ':'.
-for (const match of source.matchAll(/^ *\d+\. .*$/mg)) {
-  let str = match[0].trim();
+for (const p of root.querySelectorAll('.algorithm li > p')) {
+  let str = p.innerText;
 
-  // Strip asterisks from things like "1. *Make graph connections.*"
-  const match2 = str.match(/^(\d+\. )\*(.*)\*$/);
-  if (match2) {
-    str = match2[1] + match2[2];
-  }
+  // Strip "[Issue #123]" suffix.
+  str = str.replace(/\s+\[Issue #\d+\]/, '');
 
-  const match3 = str.match(/[^.:]$/);
-  if (match3) {
-    error(`Algorithm steps should end with '.' or ':': ${format(match3)}`);
+  const match = str.match(/[^.:]$/);
+  if (match) {
+    error(`Algorithm steps should end with '.' or ':': ${format(match)}`);
   }
 }