* Firt pass at adding multiple operands to filter operators
* Optimized parsing of multiple operands and added more tests. Need more flexibility for interpreting multiple operands as variables/text references
* Add support for parsing text references and variables in multiple operands
* Added string-replace filter for testing multiple filter operands
* Added more tests for variables and text references in operands
* Removed string-replace operator and some whitespace corrections
* Removed string-replace operator and some whitespace corrections
* Added test with comma in operand
2b31c7a509