Escape hyphens in number fields when converting to CSL

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - BibTeX parser: Fix hyphen in family name.
 - Fix a bug in EDTF parsing.
 - Bib2csl: Fix a sentence case conversion bug that words after colons are not capitalized.
+- Bib2csl: The hyphens in `number` fields are correctly escaped when converted to CSL-JSON.
 
 ## [0.5.1] - 2024-07-10
 

citeproc/citeproc-bibtex2csl.lua

@@ -488,7 +488,7 @@ function bibtex2csl.post_process_special_fields(item, entry)
     elseif item["collection-title"] and not item["collection-number"] then
       item["collection-number"] = bib_fields.number
     elseif not item.number then
-      item.number = bib_fields.number
+      item.number = string.gsub(bib_fields.number, "([^-])%-([^-])", "%1\\-%2")
     end
   end
 

tests/bibtex/biblatex-examples.json

@@ -2434,7 +2434,7 @@
 		},
 		"language": "de-DE",
 		"note": "This is a <code>\\texttt{</code><span class=\"nocase\">patent</span><code>}</code> entry with a <code>\\texttt{</code><span class=\"nocase\">location</span><code>}</code> field. The number is given in the <code>\\texttt{</code><span class=\"nocase\">number</span><code>}</code> field. Note the format of the <code>\\texttt{</code><span class=\"nocase\">location</span><code>}</code> field in the database file. Compare <code>\\texttt{</code><span class=\"nocase\">laufenberg</span><code>}</code>, <code>\\texttt{</code><span class=\"nocase\">sorace</span><code>}</code>, and <code>\\texttt{</code><span class=\"nocase\">kowalik</span><code>}</code>",
-		"number": "EU-29702195U",
+		"number": "EU\\-29702195U",
 		"publisher-place": "countryfr and countryuk and countryde",
 		"title": "Elektromagnetisches Signalhorn"
 	},
@@ -2607,7 +2607,7 @@
 		},
 		"language": "en-US",
 		"note": "This is a <code>\\texttt{</code><span class=\"nocase\">report</span><code>}</code> entry for a research report. Note the format of the <code>\\texttt{</code><span class=\"nocase\">type</span><code>}</code> field in the database file which uses a localization key. The number of the report is given in the <code>\\texttt{</code><span class=\"nocase\">number</span><code>}</code> field. Also note the <code>\\texttt{</code><span class=\"nocase\">sorttitle</span><code>}</code> and <code>\\texttt{</code><span class=\"nocase\">indextitle</span><code>}</code> fields",
-		"number": "RC-6947",
+		"number": "RC\\-6947",
 		"publisher": "IBM",
 		"title": "A hybrid hierarchical model of a <span class=\"nocase\">Multiple Virtual Storage</span> (<span class=\"nocase\">MVS</span>) operating system"
 	},
@@ -2639,7 +2639,7 @@
 		},
 		"language": "en-US",
 		"note": "This is a <code>\\texttt{</code><span class=\"nocase\">report</span><code>}</code> entry for a technical report. Note the format of the <code>\\texttt{</code><span class=\"nocase\">type</span><code>}</code> field in the database file which uses a localization key. The number of the report is given in the <code>\\texttt{</code><span class=\"nocase\">number</span><code>}</code> field. Also note the <code>\\texttt{</code><span class=\"nocase\">sorttitle</span><code>}</code> and <code>\\texttt{</code><span class=\"nocase\">indextitle</span><code>}</code> fields",
-		"number": "99-02",
+		"number": "99\\-02",
 		"publisher": "University of Massachusetts",
 		"publisher-place": "Amherst, Mass.",
 		"title": "A stochastic model of <span class=\"nocase\">TCP Reno</span> congestion avoidance and control"