qCleanup/accuracy is implemented with test case. Data set used is
chembl-rdf-void_3.ttl

Approach:

Literals are detected in object of each quad. These literals are then
check for valid RDF data type. If no then they are attempted to  be
correct.

For correction  : as discussed we are only removing whitespace and other
unseen characters like tab, etc. Further for numerical values we are
only removing alphabets.

If nothing is correct then same incorrect value is returned. This
approach can further be improve for other data type.
commit