cleanup, docs

site/doc/pages/time_precise.txt

@@ -10,7 +10,6 @@ return value : current Unix timestamp
 :content
 Returns the current Unix timestamp as a 64-bit float with millisecond accuracy or better.
 
-Related:
 
-- PHP: `microtime(true)` or high-resolution timers
-- JavaScript / Node.js: `performance.now()` or high-resolution Node timers
+:example
+print(time_precise() > 0 ? "timer\n" : "no timer\n");