Fix up some ‘help’ messages

src/test/compile-fail/hrtb-precedence-of-plus-error-message.rs

@@ -19,17 +19,17 @@ trait Bar {
 struct Foo<'a> {
     a: &'a Bar+'a,
         //~^ ERROR E0178
-        //~^^ NOTE perhaps you meant `&'a (Bar + 'a)`?
+        //~^^ HELP perhaps you meant `&'a (Bar + 'a)`?
 
     b: &'a mut Bar+'a,
         //~^ ERROR E0178
-        //~^^ NOTE perhaps you meant `&'a mut (Bar + 'a)`?
+        //~^^ HELP perhaps you meant `&'a mut (Bar + 'a)`?
 
     c: Box<Bar+'a>, // OK, no paren needed in this context
 
     d: fn() -> Bar+'a,
         //~^ ERROR E0178
-        //~^^ NOTE perhaps you forgot parentheses
+        //~^^ HELP perhaps you forgot parentheses
         //~^^^ WARN deprecated syntax
 }
 

src/test/compile-fail/require-parens-for-chained-comparison.rs

@@ -19,5 +19,5 @@ fn main() {
 
     f<X>();
     //~^ ERROR: Chained comparison operators require parentheses
-    //~^^ HELP: Use ::< instead of < if you meant to specify type arguments.
+    //~^^ HELP: use ::< instead of < if you meant to specify type arguments
 }

src/test/compile-fail/shadowed-lifetime.rs

@@ -13,18 +13,18 @@
 struct Foo<'a>(&'a isize);
 
 impl<'a> Foo<'a> {
-    //~^ HELP shadowed lifetime `'a` declared here
+    //~^ NOTE shadowed lifetime `'a` declared here
     fn shadow_in_method<'a>(&'a self) -> &'a isize {
         //~^ WARNING lifetime name `'a` shadows another lifetime name that is already in scope
-        //~| HELP deprecated
+        //~| NOTE deprecated
         self.0
     }
 
     fn shadow_in_type<'b>(&'b self) -> &'b isize {
-        //~^ HELP shadowed lifetime `'b` declared here
+        //~^ NOTE shadowed lifetime `'b` declared here
         let x: for<'b> fn(&'b isize) = panic!();
         //~^ WARNING lifetime name `'b` shadows another lifetime name that is already in scope
-        //~| HELP deprecated
+        //~| NOTE deprecated
         self.0
     }
 

src/test/compile-fail/unsized2.rs

@@ -16,5 +16,5 @@ pub fn main() {
     f<type>();
     //~^ ERROR expected identifier, found keyword `type`
     //~^^ ERROR: Chained comparison operators require parentheses
-    //~^^^ HELP: Use ::< instead of < if you meant to specify type arguments.
+    //~^^^ HELP: use ::< instead of < if you meant to specify type arguments
 }