test escape characters

[prasmussen15]

[!IMPORTANT] Add '/' to lucene_sanitize() escape list and test in helpers_test.py.

• Behavior:
  • Add '/' to the list of characters escaped by lucene_sanitize() in helpers.py.
• Testing:
  • New test test_lucene_sanitize() in helpers_test.py to verify escaping of all special characters including '/'.

^{This description was created by for 34318eeb75b5944447db39695cae70d9c1e1ce9e. It will automatically update as commits are pushed.}