New issue 203 by gromgull: Constructing a literal from another literal does
not copy language or datatype tag
http://code.google.com/p/rdflib/issues/detail?id=203
In [15]: b=rdflib.Literal("2", datatype=rdflib.XSD.integer)
In [16]: b
Out[16]: rdflib.term.Literal(u'2',
datatype=rdflib.term.URIRef('http://www.w3.org/2001/XMLSchema#integer'))
In [17]: rdflib.Literal(b)==b
Out[17]: False
In [18]: rdflib.Literal(b)
Out[18]: rdflib.term.Literal(u'2')
----
In [9]: a=rdflib.Literal("cake",lang="en")
In [10]: a
Out[10]: rdflib.term.Literal(u'cake', lang='en')
In [11]: rdflib.Literal(a)==a
Out[11]: False
In [14]: rdflib.Literal(a)
Out[14]: rdflib.term.Literal(u'cake')
The constructor thinks it's just a string - we should probably check for
literals and copy it completely.
Comment #1 on issue 203 by gromgull: Constructing a literal from another
literal does not copy language or datatype tag
http://code.google.com/p/rdflib/issues/detail?id=203
Fixed in r7a4d65400beb