github: fix build-deb-packages

.github/workflows/build-deb-packages.yml

@@ -15,7 +15,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        os: ["ubuntu-24.04", "ubuntu-22.04", "ubuntu-20.04", "ubuntu-18.04", "debian-11", "debian-10", "debian-9"]
+        os: 
+          - ubuntu-24.04
+          - ubuntu-22.04
+          - ubuntu-20.04
+          - ubuntu-18.04
+          - debian-11
+          - debian-10
+          - debian-9
 
     steps:
       - name: Checkout code
@@ -54,7 +61,7 @@ jobs:
             chmod +x debian/rules
             echo "9" > debian/compat
             echo "xnec2c ($VERSION) unstable; urgency=low\n\n  * Initial release.\n\n -- Your Name <[email protected]>  $(date -R)" > debian/changelog
-            cat > debian/control <<EOL
+            cat > debian/control <<'EOL'
 Source: xnec2c
 Section: utils
 Priority: optional
@@ -65,7 +72,7 @@ Homepage: https://www.example.com
 
 Package: xnec2c
 Architecture: any
-Depends: \${shlibs:Depends}, \${misc:Depends}
+Depends: ${shlibs:Depends}, ${misc:Depends}
 Description: A multi-threaded EM tool to model antenna near- and far-field radiation patterns.
  Xnec2c is a high-performance multi-threaded electromagnetic simulation
  package to model antenna near- and far-field radiation patterns for