escaping within field separators

[rikeshi]

CompleteSearch doesn't ignore escaped within-field-separator in fields with multiple items.

Explanation:

• Assume two fields: subject and to.
• Specify --within-field-separator=\| in the Makefile.
• Specify --allow-multiple-items=to in the Makefile.

Using the following TSV input:

subject	to
The \| subject \| value	The \| to \| value

We get the following output from the server (parsed with jq):

{
  "to": [
    "The \\",
    " to \\",
    " value"
  ],
  "subject": "The \\| subject \\| value"
}

The escaped \| are preserved in the subject field. The escaped \| are ignored in the to field and each | is interpreted as a separator.

Is there another way to escape within-field separators? Otherwise it would be a useful addition.

Tested with Docker image https://hub.docker.com/layers/adfreiburg/completesearch/latest/images/sha256-bb8ca10e5dfb0ba433f8577e6220ad1cd6017e034b3c0ba84c68b0b6b8dae41b