diff --git a/.github/workflows/latexdiff.yml b/.github/workflows/latexdiff.yml
index 0d5f542..1b1477f 100644
--- a/.github/workflows/latexdiff.yml
+++ b/.github/workflows/latexdiff.yml
@@ -78,11 +78,7 @@ jobs:
         
       - name: Override “\input{preamble/fonts}” in diff.tex
         run: |
-          sed -i "/\\input{preamble\/fonts}/c\\
-          % — replaced by CI: use TeX Gyre fonts instead of Times New Roman/Arial\\
-          \\setmainfont{TeX Gyre Termes}\\
-          \\setsansfont{TeX Gyre Heros}\\
-          \\setmonofont{TeX Gyre Cursor}" diff_output/diff.tex
+          sed -i "/\\input{preamble\/fonts}/c % — replaced by CI: use TeX Gyre fonts instead of Times New Roman\/Arial\n\\\setmainfont{TeX Gyre Termes}\n\\\setsansfont{TeX Gyre Heros}\n\\\setmonofont{TeX Gyre Cursor}" diff_output/diff.tex
           
       - name: Print preview of diff.tex (after font override)
         run: |