Bug#731461: failing test

[Calixte Denizet]

In looking at the code, the test failed on:
 EXPECT_EQ(string(tests[i].parse), s) in TestParse with tests[i].regexp
equal to "\\s".
"cc{0x9-0xa 0xc-0xd 0x20}" is expected and re[i]->Dump() is "cc{0x9-0xd
0x20}" (it seems that vertical tab (0xb) is considered as white).