input: Write a function to generate an HTML page containing a table with employee data. The function should take a list of dictionaries where each dictionary contains the employee's Name, Job Title, Department, and Salary. The function should return a string containing the HTML code for the table.
  assert generate_employee_table([{"Name": "John Doe", "Job Title": "Senior Developer", "Department": "IT", "Salary": "$120,000"}, {"Name": "Jane Doe", "Job Title": "Manager", "Department": "Finance", "Salary": "$95,000"}, {"Name": "Tim Smith", "Job Title": "Junior Developer", "Department": "IT", "Salary": "$55,000"}]) == '<html>\n  <head>\n    <title>Employee Data</title>\n  </head>\n  <body>\n    <table>\n      <thead>\n        <tr>\n          <th>Name</th>\n          <th>Job Title</th>\n          <th>Department</th>\n          <th>Salary</th>\n        </tr>\n      </thead>\n      <tbody>\n        <tr>\n          <td>John Doe</td>\n          <td>Senior Developer</td>\n          <td>IT</td>\n          <td>$120,000</td>\n        </tr>\n        <tr>\n          <td>Jane Doe</td>\n          <td>Manager</td>\n          <td>Finance</td>\n          <td>$95,000</td>\n        </tr>\n        <tr>\n          <td>Tim Smith</td>\n          <td>Junior Developer</td>\n          <td>IT</td>\n          <td>$55,000</td>\n        </tr>\n      </tbody>\n    </table>\n  </body>\n</html>'
output: def generate_employee_table(employees):
      html = '<html>\n  <head>\n    <title>Employee Data</title>\n  </head>\n  <body>\n    <table>\n      <thead>\n        <tr>\n          <th>Name</th>\n          <th>Job Title</th>\n          <th>Department</th>\n          <th>Salary</th>\n        </tr>\n      </thead>\n      <tbody>'
      for employee in employees:
          html += f'\n        <tr>\n          <td>{employee["Name"]}</td>\n          <td>{employee["Job Title"]}</td>\n          <td>{employee["Department"]}</td>\n          <td>{employee["Salary"]}</td>\n        </tr>'
      html += '\n      </tbody>\n    </table>\n  </body>\n</html>'
      return html