Fix a couple of tests

Author: mark-i-m

src/test/compile-fail/macro-at-most-once-rep-ambig.rs

@@ -27,10 +27,10 @@ pub fn main() {
     baz!(a?a?a); //~ ERROR no rules expected the token `?`
     baz!(a?a); //~ ERROR no rules expected the token `?`
     baz!(a?); //~ ERROR no rules expected the token `?`
-    baz!(a,); //~ ERROR no rules expected the token `,`
+    baz!(a,); //~ ERROR unexpected end of macro invocation
     baz!(a?a?a,); //~ ERROR no rules expected the token `?`
     baz!(a?a,); //~ ERROR no rules expected the token `?`
     baz!(a?,); //~ ERROR no rules expected the token `?`
     bar!(); //~ ERROR unexpected end of macro invocation
-    bar!(a?); //~ ERROR no rules expected the token `?`
+    bar!(a?); //~ ERROR unexpected end of macro invocation
 }

src/test/parse-fail/issue-33569.rs

@@ -13,7 +13,7 @@
 macro_rules! foo {
     { $+ } => { //~ ERROR expected identifier, found `+`
                 //~^ ERROR missing fragment specifier
-        $(x)(y) //~ ERROR expected `*` or `+`
+        $(x)(y) //~ ERROR expected one of: `*`, `+`, or `?`
     }
 }