Include middle name in bibtex output, format initials

[lfoppiano]

This PR fixes the issue reported in #1351:

• adds the middle name if present, do not add comma between first and middle name
• add period if first or middle name are initials

Now the output should be correct:

curl -X POST "http://localhost:8070/api/processCitation" \
  -H "Accept: application/x-bibtex" \
  --data-urlencode "citations=Dill, K. A., Ozkan, S. B., Shell, M. S. & Weikl, T. R. The protein folding problem. Annu. Rev. Biophys. 37, 289–316 (2008)."

@article{-1,
  author = {Dill, K. A. and Ozkan, S. B. and Shell, M. S. and Weikl, T. R.},
  title = {The protein folding problem},
  journal = {Annu. Rev. Biophys},
  date = {2008},
  year = {2008},
  pages = {289--316},
  volume = {37}
}

[Copilot]

Pull request overview

This PR updates Grobid’s BibTeX serialization to include middle names/initials in author (and now also editor) fields and to add trailing periods for single-letter initials, addressing the missing-middle-name behavior reported in #1351.

Changes:

• Update BiblioItem.toBibTeX() to include Person.middleName in BibTeX author output and add “.” for single-letter first/middle initials.
• Apply the same formatting logic to BibTeX editor output using fullEditors.
• Update REST-service BibTeX expectations in tests to reflect periods after single-letter initials.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
grobid-core/src/main/java/org/grobid/core/data/BiblioItem.java	Enhances BibTeX formatting for author/editor by including middle names and adding periods for single-letter initials.
grobid-service/src/test/java/org/grobid/service/tests/GrobidRestServiceTest.java	Updates expected BibTeX strings to match the new initials formatting behavior.

Comments suppressed due to low confidence (1)

grobid-service/src/test/java/org/grobid/service/tests/GrobidRestServiceTest.java:269

• This PR addresses missing middle names and initial punctuation in BibTeX, but the service tests only cover adding periods for single-letter first names (e.g., "S."), not inclusion of middle names (e.g., "Dill, K. A."). Adding a REST test case that posts a citation containing a middle initial and asserts the BibTeX author field includes both initials (with periods) would prevent regressions of #1351.

    public void processCitationReturnsBibTeX() {
        Form form = new Form();
        form.param(GrobidRestService.CITATION, "Kolb, S., Wirtz G.: Towards Application Portability in Platform as a Service\n" +
            "Proceedings of the 8th IEEE International Symposium on Service-Oriented System Engineering (SOSE), Oxford, United Kingdom, April 7 - 10, 2014.");
        Response response = getClient().target(baseUrl()).path(GrobidPaths.PATH_CITATION)
                                       .request()
                                       .accept(BibTexMediaType.MEDIA_TYPE)
                                       .post(Entity.entity(form, MediaType.APPLICATION_FORM_URLENCODED_TYPE));
        assertEquals(Response.Status.OK.getStatusCode(), response.getStatus());
        assertEquals("@inproceedings{-1,\n" +
                "  author = {Kolb, S. and Wirtz, G.},\n" +
                "  booktitle = {Towards Application Portability in Platform as a Service Proceedings of the 8th IEEE International Symposium on Service-Oriented System Engineering (SOSE)},\n" +
                "  date = {2014},\n" +
                "  year = {2014},\n" +
//                "  year = {April 7 - 10, 2014},\n" +
                "  address = {Oxford, United Kingdom}\n" +
                "}\n",
            response.readEntity(String.class));

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

Comments suppressed due to low confidence (1)

grobid-service/src/test/java/org/grobid/service/tests/GrobidRestServiceTest.java:270

• The updated expectations cover adding periods for initials, but there is still no test asserting that BibTeX output includes middle names (the core behavior change in #1351). Adding a dedicated citation example like "Dill, K. A." and asserting author = {Dill, K. A. ...} would prevent regressions in middle-name handling and initial formatting together.

    public void processCitationReturnsBibTeX() {
        Form form = new Form();
        form.param(GrobidRestService.CITATION, "Kolb, S., Wirtz G.: Towards Application Portability in Platform as a Service\n" +
            "Proceedings of the 8th IEEE International Symposium on Service-Oriented System Engineering (SOSE), Oxford, United Kingdom, April 7 - 10, 2014.");
        Response response = getClient().target(baseUrl()).path(GrobidPaths.PATH_CITATION)
                                       .request()
                                       .accept(BibTexMediaType.MEDIA_TYPE)
                                       .post(Entity.entity(form, MediaType.APPLICATION_FORM_URLENCODED_TYPE));
        assertEquals(Response.Status.OK.getStatusCode(), response.getStatus());
        assertEquals("@inproceedings{-1,\n" +
                "  author = {Kolb, S. and Wirtz, G.},\n" +
                "  booktitle = {Towards Application Portability in Platform as a Service Proceedings of the 8th IEEE International Symposium on Service-Oriented System Engineering (SOSE)},\n" +
                "  date = {2014},\n" +
                "  year = {2014},\n" +
//                "  year = {April 7 - 10, 2014},\n" +
                "  address = {Oxford, United Kingdom}\n" +
                "}\n",
            response.readEntity(String.class));
    }

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Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

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Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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