Minor style improvements for test functions

Use argument pattern-matching for test_division_rule and remove visibility specifier for test_signed

src/libcore/num/float.rs

@@ -798,7 +798,7 @@ mod tests {
     }
 
     #[test]
-    pub fn test_signed() {
+    fn test_signed() {
         assert_eq!(infinity.abs(), infinity);
         assert_eq!(1f.abs(), 1f);
         assert_eq!(0f.abs(), 0f);

src/libcore/num/int-template.rs

@@ -553,10 +553,7 @@ mod tests {
     /// - `qr`: quotient and remainder
     ///
     #[cfg(test)]
-    fn test_division_rule(nd: (T,T), qr: (T,T)) {
-        let (n,d) = nd,
-            (q,r) = qr;
-
+    fn test_division_rule((n,d): (T,T), (q,r): (T,T)) {
         assert_eq!(d * q + r, n);
     }