Fix tidy errors

src/librustc_borrowck/borrowck/mod.rs

@@ -719,7 +719,11 @@ impl<'a, 'tcx> BorrowckCtxt<'a, 'tcx> {
 
                 let mut db = match err.cause {
                     MutabilityViolation => {
-                        struct_span_err!(self.tcx.sess, error_span, E0594, "cannot assign to {}", descr)
+                        struct_span_err!(self.tcx.sess,
+                                         error_span,
+                                         E0594,
+                                         "cannot assign to {}",
+                                         descr)
                     }
                     BorrowViolation(euv::ClosureCapture(_)) => {
                         struct_span_err!(self.tcx.sess, error_span, E0595,

src/test/ui/generator/yield-in-args-rev.rs

@@ -15,10 +15,10 @@ fn foo(_a: (), _b: &bool) {}
 // Some examples that probably *could* be accepted, but which we reject for now.
 
 fn bar() {
-	|| {
-		let b = true;
-		foo(yield, &b); //~ ERROR
-	};
+    || {
+        let b = true;
+        foo(yield, &b); //~ ERROR
+    };
 }
 
 fn main() { }

src/test/ui/generator/yield-in-args.rs

@@ -13,8 +13,8 @@
 fn foo(_b: &bool, _a: ()) {}
 
 fn main() {
-	|| {
-		let b = true;
-		foo(&b, yield); //~ ERROR
-	};
+    || {
+        let b = true;
+        foo(&b, yield); //~ ERROR
+    };
 }