Removing trailing whitespace leftover from last re-formatting commit

src/test/compile-fail/E0060.rs

@@ -13,7 +13,7 @@ extern "C" {
 }
 
 fn main() {
-    unsafe { printf(); } 
+    unsafe { printf(); }
     //~^ ERROR E0060
     //~| NOTE expected at least 1 parameter
     //~| NOTE the following parameter type was expected

src/test/compile-fail/E0061.rs

@@ -12,7 +12,7 @@ fn f(a: u16, b: &str) {}
 
 fn main() {
     f(0);
-    //~^ ERROR E0061 
+    //~^ ERROR E0061
     //~| NOTE expected 2 parameters
     //~| NOTE the following parameter types were expected
 }

src/test/compile-fail/issue-18819.rs

@@ -23,7 +23,7 @@ fn print_x(_: &Foo<Item=bool>, extra: &str) {
 }
 
 fn main() {
-    print_x(X); 
+    print_x(X);
     //~^ ERROR this function takes 2 parameters but 1 parameter was supplied
     //~| NOTE the following parameter types were expected: &Foo<Item=bool>, &str
     //~| NOTE expected 2 parameters