commitid.scad.pl: Break out argl_formal and argl_actual (nfc)

diff --git a/commitid.scad.pl b/commitid.scad.pl
index 6a4aa1f382eff1a8afc00c36687b087d9d03f760..c1d3a4c9ea36c31dc07f5241210419de990015bb 100755 (executable)
--- a/commitid.scad.pl
+++ b/commitid.scad.pl
@@ -279,12 +279,15 @@ sub gentextmodule_demo_start_batch () {
     $gtm_demo_i++;
 }
 
+sub argl_formal (@) { join ', ', @_; }
+sub argl_actual (@) { join ',', map { m/=/ ? $` : $_ } @_; }
+
 sub gen3dmodule ($@) {
     my ($modb,@argl) = (@_);
-    p "module ${modb}(".(join ', ', @argl)."){\n";
+    p "module ${modb}(".argl_formal(@argl)."){\n";
     p " d=Commitid_depth();\n";
     p " translate([0,0,-d]) linear_extrude(height=d*2)\n";
-    p "  ${modb}_2D(".(join ',', map { m/=/ ? $` : $_ } @argl).");\n";
+    p "  ${modb}_2D(".argl_actual(@argl).");\n";
     p "}\n";
 }
 
@@ -545,7 +548,7 @@ sub do_some_best ($$) {
     my ($modname, $formre) = @_;
     my $fullmodname = "Commitid_${modname}_2D";
     my @argl = qw(max_sz margin=Commitid_pixelsz());
-    p "module $fullmodname(".(join ', ', @argl).") {\n";
+    p "module $fullmodname(".argl_formal(@argl).") {\n";
     my $mbs = '$Commitid_max_best_scale';
     p " sc_max = $mbs ? $mbs : 2;\n";
     p " sz = max_sz - 2*[margin,margin];\n";