Make types optional in documentation generators.

src/main/scripts/lib/lua/devices.lua

@@ -29,11 +29,17 @@ Device.__tostring = function(self)
         else
           doc = doc .. "arg" .. i
         end
-        doc = doc .. ": " .. p.type
+        if p.type then
+            doc = doc .. ": " .. p.type
+        end
         i = i + 1
       end
     end
-    doc = doc .. "): " .. method.returnType .. "\n"
+    doc = doc .. ")"
+    if method.returnType then
+        doc = doc .. ": " .. method.returnType
+    end
+    doc = doc .. "\n"
 
     if method.description then
       doc = doc .. method.description .. "\n"

src/main/scripts/lib/micropython/devices.py

@@ -28,9 +28,13 @@ class Device:
                         doc += p["name"]
                     else:
                         doc += "arg" + str(i)
-                    doc += ": " + p["type"]
+                    if "type" in p:
+                        doc += ": " + p["type"]
                     i += 1
-            doc += "): " + method["returnType"] + "\n"
+            doc += ")"
+            if "returnType" in method:
+                doc += ": " + method["returnType"]
+            doc += "\n"
 
             if "description" in method and method["description"]:
                 doc += method["description"] + "\n"