ruby-rdf/sparql-client — pull request #41 by dannybtran (2014-03-30 22:01:43+00:00)
Title: distinct should work with the "*" select form

`&&` and `and` are not identical
`a = true and false` results in `a` = `true`
`a = true && false` results in `a` = `false` as intended
in order to achieve the same results with `and` you must indicate
the precedence, e.g. `a = (true and false)`