escaped quotes in turtle output

[lueck]

When normalizing a selector and serializing the result to Turtle RDF, single quotes in the normalized XPath component are escaped to '.

E.g.

$ cli/target/bin/oasel normalize test/gesang.annot1.json -l jsonld -f ttl
...
                                              "id('v3')/text()[2]";
...

Should be

                                              "id('v3')/text()[2]";

The problem occurs with other serializations, too.

Assignees: @lueck

Migrated from GitLab: https://zivgitlab.uni-muenster.de/SCDH/selectors/selection-engine/-/issues/13