Update: Switch to simple string and cleanup syntax and comments.

Update: Switch to simple string and cleanup syntax and comments.

The f_string_static_t operations_name array can be converted to just an array of f_string_t.
Then the f_string_range_t operations_range can become f_array_length_t operations_length.
Then the operation_name can be removed (it appears to be unused).
Finally The fl_string_dynamic_partial_compare() can become fl_string_dynamic_partial_compare_string().

Update comments and add additional inline comments to help clarify situations.