Fix formatting

Author: Zoxc

src/librustc/hir/lowering.rs

@@ -2187,7 +2187,9 @@ impl<'a> LoweringContext<'a> {
                 let iter = self.str_to_ident("iter");
 
                 let next_ident = self.str_to_ident("_next");
-                let next_pat = self.pat_ident_binding_mode(e.span, next_ident, hir::BindByValue(hir::MutMutable));
+                let next_pat = self.pat_ident_binding_mode(e.span,
+                                                           next_ident,
+                                                           hir::BindByValue(hir::MutMutable));
 
                 // `::std::option::Option::Some(val) => next = val`
                 let pat_arm = {