drop accidental trailing whitespace

Author: ivan-shrimp

library/core/src/num/nonzero.rs

@@ -1237,7 +1237,7 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
             let mut op = self.get();
             let mut res = 0;
             let mut one = 1 << (self.ilog2() & !1);
-            
+
             while one != 0 {
                 if op >= res + one {
                     op -= res + one;