Incorrect error message "missing end of filter" on certain invalid filters

[glyn]

Should not say "missing end of filter".

See:

• https://cburgmer.github.io/json-path-comparison/results/filter_expression_with_empty_expression.html
• https://cburgmer.github.io/json-path-comparison/results/filter_expression_with_equals_array.html
• https://cburgmer.github.io/json-path-comparison/results/filter_expression_with_equals_array_with_single_quotes.html
• https://cburgmer.github.io/json-path-comparison/results/filter_expression_with_equals_object.html
• https://cburgmer.github.io/json-path-comparison/results/filter_expression_with_in_array_of_values.html
• https://cburgmer.github.io/json-path-comparison/results/filter_expression_with_in_current_object.html
• https://cburgmer.github.io/json-path-comparison/results/filter_expression_with_single_equal.html
• https://cburgmer.github.io/json-path-comparison/results/filter_expression_with_triple_equal.html

[glyn]

After recent updates, this no longer reproduces on any of the above examples.

[glyn]

Still seems to be a problem. e.g. with $[?()]. Re-opening.