tostring golf

this could be golfed further by rewriting the str..= line in terms of fmt, but the performance impact of inserting the extra `fmt` calls and parsing into the tostring recursion seems likely to be a problem.

chameleonic.p8

@@ -279,14 +279,12 @@ function kbd:release(i)
 end
 
 function tostring(any)
- if type(any)=="table" then
+ if (type(any)!="table") return tostr(any)
-  local str = "{ "
+ local str = "{ "
-  for k,v in pairs(any) do
+ for k,v in pairs(any) do
-      str=str..tostring(k).."->"..tostring(v).." "
+  str..=tostring(k).."->"..tostring(v).." "
-  end
-  return str.."}"
  end
- return tostr(any)
+ return str.."}"
 end
 
 -->8