test: fixing linting for modified tests

Author: truonghnancy

test/parallel/test-buffer-alloc.js

@@ -967,18 +967,14 @@ common.expectsError(
     message: 'argument must be a buffer'
   });
 
-const regErrorMsg =
-  new RegExp('The first argument must be one of type string, Buffer, ' +
-             'ArrayBuffer, Array, or Array-like Object\\.');
-
 assert.throws(() => Buffer.from(), {
   name: 'TypeError [ERR_INVALID_ARG_TYPE]',
-  message: 'The first argument must be one of type string, Buffer, ' + 
+  message: 'The first argument must be one of type string, Buffer, ' +
   'ArrayBuffer, Array, or Array-like Object. Received type undefined'
 });
 assert.throws(() => Buffer.from(null), {
   name: 'TypeError [ERR_INVALID_ARG_TYPE]',
-  message: 'The first argument must be one of type string, Buffer, ' + 
+  message: 'The first argument must be one of type string, Buffer, ' +
   'ArrayBuffer, Array, or Array-like Object. Received type object'
 });
 

test/parallel/test-buffer-arraybuffer.js

@@ -43,7 +43,7 @@ assert.throws(function() {
 }, {
   code: 'ERR_INVALID_ARG_TYPE',
   name: 'TypeError [ERR_INVALID_ARG_TYPE]',
-  message: 'The first argument must be one of type string, Buffer,' + 
+  message: 'The first argument must be one of type string, Buffer,' +
   ' ArrayBuffer, Array, or Array-like Object. Received type object'
 });