Update dtolnay's tests that now work

Author: petrochenkov

src/test/ui/tuple/index-float.rs

@@ -1,7 +1,9 @@
+// check-pass
+
 fn main() {
     let tuple = (((),),);
 
-    let _ = tuple. 0.0; //~ ERROR unexpected token: `0.0`
+    let _ = tuple. 0.0; // OK, whitespace
 
-    let _ = tuple./*special cases*/0.0; //~ ERROR unexpected token: `0.0`
+    let _ = tuple./*special cases*/0.0; // OK, comment
 }

src/test/ui/tuple/index-float.stderr

@@ -2,19 +2,19 @@ error[E0609]: no field `1` on type `(((),),)`
   --> $DIR/index-invalid.rs:2:22
    |
 LL |     let _ = (((),),).1.0;
-   |                      ^
+   |                      ^^^
 
 error[E0609]: no field `1` on type `((),)`
-  --> $DIR/index-invalid.rs:4:24
+  --> $DIR/index-invalid.rs:4:22
    |
 LL |     let _ = (((),),).0.1;
-   |                        ^
+   |                      ^^^
 
 error[E0609]: no field `000` on type `(((),),)`
   --> $DIR/index-invalid.rs:6:22
    |
 LL |     let _ = (((),),).000.000;
-   |                      ^^^
+   |                      ^^^^^^^
 
 error: aborting due to 3 previous errors
 

src/test/ui/tuple/index-invalid.stderr

@@ -1,9 +1,9 @@
-// Broken by https://github.com/rust-lang/rust/pull/70420.
+// check-pass
 
 macro_rules! m {
     (.$l:literal) => {};
 }
 
-m!(.0.0); //~ ERROR no rules expected the token `.`
+m!(.0.0); // OK, `0.0` after a dot is still a float token.
 
 fn main() {}