fix: avoid a backslash-dot sequence in the Typst filename helper

Author: mcanouil

src/resources/formats/typst/pandoc/quarto/definitions.typ

@@ -66,7 +66,7 @@
   let filename = if type(filename) == str and filename.len() > 40 {
     filename
       .replace(regex("[/_.-]"), m => m.text + "\u{200b}")
-      .replace(regex("\\.\u{200b}([^.]*)\\z"), m => "." + m.captures.at(0))
+      .replace(regex("[.]\u{200b}([^.]*)\\z"), m => "." + m.captures.at(0))
       .replace(regex("[^/_.\u{200b}-]{31,}"), m => m.text.clusters().join("\u{200b}"))
   } else { filename }
   show raw.where(block: true): it => it

tests/docs/smoke-all/typst/code-filename/edge/e06-special.qmd

@@ -14,7 +14,7 @@ _quarto:
           - 'quarto-code-filename\("e\*f_g\.py"'
           - 'quarto-code-filename\("123"'
           - 'replace\(regex\("\[/_\.-\]"\), m => m\.text \+ "\\u\{200b\}"\)'
-          - 'replace\(regex\("\\\\\.\\u\{200b\}\(\[\^\.\]\*\)\\\\z"\)'
+          - 'replace\(regex\("\[\.\]\\u\{200b\}\(\[\^\.\]\*\)\\\\z"\)'
           - 'replace\(regex\("\[\^/_\.\\u\{200b\}-\]\{31,\}"\)'
         - []
 ---