tint: Minor, miscellaneous cleanups

• Rename the 'friendly names' for the abstract numeric types so they match
  the style in the intrinsic table.
• Fix a comment so the literal type is correct.

Change-Id: Ie8d7363743c8c359340de3bc6db9a3456d299d34
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/91021
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>

src/tint/resolver/var_let_test.cc

@@ -86,7 +86,7 @@ TEST_F(ResolverVarLetTest, VarDeclWithConstructor) {
     // struct S { i : i32; }
     // alias A = S;
     // fn F(){
-    //   var i : i32 = 1;
+    //   var i : i32 = 1i;
     //   var u : u32 = 1u;
     //   var f : f32 = 1.f;
     //   var b : bool = true;

src/tint/sem/abstract_float.cc

@@ -34,7 +34,7 @@ bool AbstractFloat::Equals(const sem::Type& other) const {
 }
 
 std::string AbstractFloat::FriendlyName(const SymbolTable&) const {
-    return "AbstractFloat";
+    return "abstract-float";
 }
 
 }  // namespace tint::sem

src/tint/sem/abstract_int.cc

@@ -34,7 +34,7 @@ bool AbstractInt::Equals(const sem::Type& other) const {
 }
 
 std::string AbstractInt::FriendlyName(const SymbolTable&) const {
-    return "AbstractInt";
+    return "abstract-int";
 }
 
 }  // namespace tint::sem