* Add a doctest to BooleanQuery
Closes#446
Mark a function that is only used in tests to be compiled for tests only
Fix doc-comments in a couple of related files
* Minor corrections
remove whitespace, fix typos, add explicit dyn marker
* WIP: BooleanQuery doc test
Trying to nest several BooleanQueries together
* Addressed old review
rust 2018 edition + make function available to everyone
* Box the previous query to resolve the type error
* Rework wording in DocAdress document strings
* Reworded and restructured the docstring