cosmetics 2

doc/Grobid-service.md

@@ -143,6 +143,7 @@ Extract the header of the input PDF document, normalize it and convert it into a
 Use `Accept: application/x-bibtex` to retrieve BibTeX format instead of XML TEI. 
 
 However, please bear in mind the following information:
+
 * the TEI XML format is much richer and structured, it should be preferred if there is no particular reason to use BibTeX, so we recommend to always use `Accept: application/xml`.
 * always supply an `Accept` header or the response type may be inconsistent. There is no easy way to supply a default response type in the API. See discussion [#1093](https://github.com/kermitt2/grobid/issues/1093).