cleanup, docs

site/doc/pages/signal_name.txt

@@ -1,5 +1,5 @@
 :sig
-String signal_name(int sig)
+String signal_name(s32 sig)
 
 :params
 sig : POSIX signal number
@@ -19,4 +19,4 @@ Example:
 This is mostly useful in diagnostics and error reporting code.
 
 :example
-print("signal_name example\n");
+print(signal_name(SIGSEGV), " / ", signal_name(SIGABRT), "\n");