Added test case and cleaned up comments in StringExtensionTests
Added test case and cleaned up comments in StringExtensionTests

sillsdev/libpalaso,gmartin7/libpalaso,sillsdev/libpalaso,ermshiperete/libpalaso,gmartin7/libpalaso,sillsdev/libpalaso,ermshiperete/libpalaso,ermshiperete/libpalaso,gmartin7/libpalaso,sillsdev/libpalaso,gmartin7/libpalaso,ermshiperete/libpalaso