test: change some regular expressions to strings

Author: ejc-main

test/pummel/test-crypto-dh.js

@@ -20,17 +20,17 @@ assert.throws(
   function() {
     crypto.getDiffieHellman('modp1').setPrivateKey('');
   },
-  new RegExp(/^TypeError: crypto\.getDiffieHellman\(\.\.\.\)\./.source +
-  /setPrivateKey is not a function$/.source),
+  new RegExp('^TypeError: crypto\\.getDiffieHellman\\(\\.\\.\\.\\)\\.' +
+  'setPrivateKey is not a function$'),
   'crypto.getDiffieHellman(\'modp1\').setPrivateKey(\'\') ' +
   'failed to throw the expected error.'
 );
 assert.throws(
   function() {
     crypto.getDiffieHellman('modp1').setPublicKey('');
   },
-  new RegExp(/^TypeError: crypto\.getDiffieHellman\(\.\.\.\)\./.source +
-  /setPublicKey is not a function$/.source),
+  new RegExp('^TypeError: crypto\\.getDiffieHellman\\(\\.\\.\\.\\)\\.' +
+  'setPublicKey is not a function$'),
   'crypto.getDiffieHellman(\'modp1\').setPublicKey(\'\') ' +
   'failed to throw the expected error.'
 );