Remove RawTextQuery.changeQuery in favor of getNewFullQuery

Also includes the following:
- Introduce typing in RawTextQuery
- Remove an outdated description based on the change
- Refactor setting the autocomplete_location, its more clear to set the
variable in the construct instead of within the method
- Update unit tests to reflect the new method

rephrasing

format

undo change

searx/search/processors/abstract.py

@@ -144,6 +144,7 @@ class EngineProcessor(ABC):
         - A page-number > 1 when engine does not support paging.
         - A time range when the engine does not support time range.
         """
+
         # if paging is not supported, skip
         if search_query.pageno > 1 and not self.engine.paging:
             return None