Description of proposed changes

• utils.utils1.update_template_file():
  • add "" to the special symbol interpretation list while searching for template option values, to fix the issue found in Create Coseismic_Requirement_Validation-Approach2.ipynb nisar-solid/ATBD#26
  • use "value2search" for "re.findall()" expression, without changing original value variable, for more robust replace() operation.

Reminders

• Pass Codacy code review (green)
• Pass Circle CI test (green)
• If modifying functionality, describe changes to function behavior and arguments in a comment below the function declaration.