Rename RTL symbol to data

Rakefile

@@ -36,22 +36,25 @@ end
 
 desc 'Convert previous stage language into the current stage language'
 task :convert do
-  File.open('boot/stage21/cl.elna', 'w') do |current_stage|
-    File.readlines('boot/stage20/cl.elna').each do |line|
+  File.open('boot/stage22/cl.elna', 'w') do |current_stage|
+    seen_proc = false
+    File.readlines('boot/stage21/cl.elna').each do |line|
+      seen_proc = true if line.start_with? 'proc'
+      seen_proc = false if line.start_with? 'end'
+      if line.start_with?('begin') && !seen_proc
+        current_stage << <<~FUN
+
+          proc f();
+          var
+          	x: ElnaLocation;
+          	y: ElnaLocation;
+          begin
+          	x := y;
+          end;
+
+        FUN
+      end
       current_stage << line
     end
-#    current_stage << <<~FUN
-#
-#      proc f(m: ElnaInstructionModule);
-#      begin
-#      end;
-#
-#      proc g();
-#      var
-#      	x: ElnaInstructionModule;
-#      begin
-#      	f(x)
-#      end;
-#    FUN
   end
 end