fix: update test expectations for new error codes

Author: shetzel

test/commands/sfdx/alias/set.nut.ts

@@ -111,9 +111,7 @@ describe('alias:set NUTs', async () => {
 
     it('alias:set without varargs stdout', () => {
       const res: string = execCmd('alias:set ').shellOutput.stderr;
-      expect(res).to.include(
-        'Error (1): You must provide one or more aliases to set. Use the --help flag to see examples.'
-      );
+      expect(res).to.include('You must provide one or more aliases to set. Use the --help flag to see examples.');
     });
   });
 });

test/commands/sfdx/config/unset.nut.ts

@@ -24,7 +24,7 @@ describe('config:unset NUTs', async () => {
           'You must provide one or more configuration variables to unset. Run "sf config list" to see the configuration variables you\'ve previously set.',
         name: 'NoConfigKeysFoundError',
         status: 1,
-        code: 1,
+        code: 'NoConfigKeysFoundError',
         exitCode: 1,
         warnings: [],
       });