Fix typos and check for Windows names

Author: dpvc

cjs/util/Tex.js

@@ -180,7 +180,7 @@ const Tex = exports.Tex = {
         const file = readdirSync(dir).find((name) => name.endsWith('Configuration.js'));
         promises.push(Util.import(`${dir}/${file}`));
       } else {
-        Uti.error(`Unknown TeX package: ${name}`);
+        Util.error(`Unknown TeX package: ${name}`);
       }
     }
     //

mjs/util/Tex.js

@@ -176,7 +176,7 @@ export const Tex = {
         const file = readdirSync(dir).find((name) => name.endsWith('Configuration.js'));
         promises.push(Util.import(`${dir}/${file}`));
       } else {
-        Uti.error(`Unknown TeX package: ${name}`);
+        Util.error(`Unknown TeX package: ${name}`);
       }
     }
     //

mjs/util/Util.js

@@ -415,6 +415,9 @@ export const Util = {
    * Import a file with error reporting.
    */
   import(name) {
+    if (name.match(/^[a-z]:[/\\]/)) {
+      name = 'file://' + name;
+    }
     return import(name).catch((err) => Util.fail(err.message));
   },