Fix errors running Nightwatch's execute()

[Antonio-Maranhao]

Overview

Fix syntax errors when calling Nightwatch execute() function.

Testing recommendations

Verify that errors like the one below are no longer printed:

>> Error
>>      Response 500 POST /session/00adc39b522f52a7247d46533b2f9bc4/execute/sync (19ms)
   {
     value: {
       error: 'javascript error',
       message: 'javascript error: Invalid left-hand side in assignment\n' +
         '  (Session info: chrome=125.0.6422.141)',
       stacktrace: ''
     }
  }

GitHub issue number

n/a

Related Pull Requests

n/a

Checklist

• Code is written and works correctly;
• Changes are covered by tests;
• Documentation reflects the changes;
• Update rebar.config.script with the correct tag once a new Fauxton release is made

[Antonio-Maranhao]

Closed in favor of #1450