For syntax highlighting

plugins/pfand

@@ -1,3 +1,5 @@
+#!perl
+
 HELP "pfand" => "Pfand zurueck";
 
 # This is a demo plugin. It's called "pfand" because "deposit" would be

plugins/repeat

@@ -1,3 +1,5 @@
+#!perl
+
 my $err_stacked = "Stacked repetition is not supported.";
 my $err_multi = "Repetition not supported in multi-user transactions.";
 my $err_pfand = "Plugins 'pfand' and 'repeat' cannot be combined.";

plugins/voorbeeld

@@ -1,3 +1,5 @@
+#!perl
+
 sub command { print "@_\n"; NEXT }