refactor: extract coerce and stressorToString into util.js

static/ast-parser.js

@@ -1,16 +1,8 @@
+import { coerce } from './util.js';
+
 const LINE_RE = /^(\d{2}) (\S+(?:\.\S+)*) ?(.*)/;
 const DEBUG_RE = /^\d{2} # DEBUG/;
 
-
-export function coerce(s) {
-    if (s === 'True' || s === 'Y' || s === 'on' || s === 'true') return true;
-    if (s === 'False' || s === 'N' || s === 'off' || s === 'false') return false;
-    if (s === '') return s;
-    const n = Number(s);
-    if (!isNaN(n)) return n;
-    return s;
-}
-
 export function parseAstLog(text) {
     const root = { slot: 'root', parentSlot: null, depth: -1, positionals: [], props: {}, children: [] };
     const stack = [root];