When the lines qualifier is present in a SWHID for a content, the corresponding code fragment must be highlighted independently of the presence or absence of other qualifiers.
Currently this seems not to be the case: compare the following variants

1. https://archive.softwareheritage.org/swh:1:cnt:c428f4deb1cdff8500fff5c449b99454a816c163;lines=33-44;origin=https://gitorious.org/ocamlp3l/ocamlp3l_cvs.git;anchor=swh:1:rev:2db189928c94d62a3b4757b3eec68f0a4d4113f0;path=/Tools/ocamlp3lrun;visit=swh:1:snp:d7f1b9eb7ccb596c2622c4780febaa02549830f9
2. https://archive.softwareheritage.org/swh:1:cnt:c428f4deb1cdff8500fff5c449b99454a816c163;lines=33-44;origin=https://gitorious.org/ocamlp3l/ocamlp3l_cvs.git;anchor=swh:1:rev:2db189928c94d62a3b4757b3eec68f0a4d4113f0;path=/Tools/ocamlp3lrun
3. https://archive.softwareheritage.org/swh:1:cnt:c428f4deb1cdff8500fff5c449b99454a816c163;lines=33-44;origin=https://gitorious.org/ocamlp3l/ocamlp3l_cvs.git;visit=swh:1:snp:d7f1b9eb7ccb596c2622c4780febaa02549830f9
4. https://archive.softwareheritage.org/swh:1:cnt:c428f4deb1cdff8500fff5c449b99454a816c163;lines=33-44;origin=https://gitorious.org/ocamlp3l/ocamlp3l_cvs.git

1,3 and 4 work as expected, but not 2, where an anchor is present, but not a visit