Suppress warnings

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1583766 13f79535-47bb-0310-9956-ffa450edef68
Typo

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1583919 13f79535-47bb-0310-9956-ffa450edef68
Intermediate values did not have their Node form set.
Need to asNode(), not getNode() to ensure the Node is created
before getting it's lexical form.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1583920 13f79535-47bb-0310-9956-ffa450edef68
JENA-667 : void -> boolean return for .remove(Object,Object) to align with Java 8.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1583962 13f79535-47bb-0310-9956-ffa450edef68
JENA-668 : Typo's for 'language'

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