precision in readme

Author: Canop

README.md

@@ -59,6 +59,8 @@ assert_eq!(r.is_match(r#" "Aristote" "Platon" "#), true);
 
 ```
 
+What you really get from this macro call is a reference to a `regex::Regex`, statically checked, and behind a static `once_cell` lazy initializer.
+
 # Test
 
 ```rust

src/lib.rs

@@ -28,7 +28,6 @@ assert_eq!(r.is_match("Saa"), false);
 let r = regex!("sa+$"i);
 assert_eq!(r.is_match("Saa"), true);
 
-
 // you can use a raw literal
 let r = regex!(r#"^"+$"#);
 assert_eq!(r.is_match("\"\""), true);