Update UI tests for latest nightly and 'pear' error messages.

core/codegen/tests/ui-fail-nightly/async-entry.stderr

@@ -134,7 +134,7 @@ error[E0308]: mismatched types
    | |
 27 | |         rocket::ignite()
 28 | |     }
-   | |     ^- help: try adding a semicolon: `;`
+   | |     ^- help: consider using a semicolon here: `;`
    | |_____|
    |       expected `()`, found struct `Rocket`
 

core/codegen/tests/ui-fail-nightly/route-path-bad-syntax.stderr

@@ -1,4 +1,4 @@
-error: invalid path URI: expected token / but found a at index 0
+error: invalid path URI: expected token '/' but found 'a' at index 0
  --> $DIR/route-path-bad-syntax.rs:5:8
   |
 5 | #[get("a")]
@@ -6,7 +6,7 @@ error: invalid path URI: expected token / but found a at index 0
   |
   = help: expected path in origin form: "/path/<param>"
 
-error: invalid path URI: unexpected EOF: expected token / at index 0
+error: invalid path URI: unexpected EOF: expected token '/' at index 0
  --> $DIR/route-path-bad-syntax.rs:8:8
   |
 8 | #[get("")]
@@ -14,7 +14,7 @@ error: invalid path URI: unexpected EOF: expected token / at index 0
   |
   = help: expected path in origin form: "/path/<param>"
 
-error: invalid path URI: expected token / but found a at index 0
+error: invalid path URI: expected token '/' but found 'a' at index 0
   --> $DIR/route-path-bad-syntax.rs:11:8
    |
 11 | #[get("a/b/c")]
@@ -50,7 +50,7 @@ error: paths cannot contain empty segments
    |
    = note: expected '/a/b', found '/a/b//'
 
-error: invalid path URI: expected EOF but found # at index 3
+error: invalid path URI: expected EOF but found '#' at index 3
   --> $DIR/route-path-bad-syntax.rs:28:11
    |
 28 | #[get("/!@#$%^&*()")]

core/codegen/tests/ui-fail-stable/route-path-bad-syntax.stderr

@@ -1,18 +1,18 @@
-error: invalid path URI: expected token / but found a at index 0
+error: invalid path URI: expected token '/' but found 'a' at index 0
   --- help: expected path in origin form: "/path/<param>"
  --> $DIR/route-path-bad-syntax.rs:5:7
   |
 5 | #[get("a")]
   |       ^^^
 
-error: invalid path URI: unexpected EOF: expected token / at index 0
+error: invalid path URI: unexpected EOF: expected token '/' at index 0
   --- help: expected path in origin form: "/path/<param>"
  --> $DIR/route-path-bad-syntax.rs:8:7
   |
 8 | #[get("")]
   |       ^^
 
-error: invalid path URI: expected token / but found a at index 0
+error: invalid path URI: expected token '/' but found 'a' at index 0
   --- help: expected path in origin form: "/path/<param>"
   --> $DIR/route-path-bad-syntax.rs:11:7
    |
@@ -45,7 +45,7 @@ error: paths cannot contain empty segments
 23 | #[get("/a/b//")]
    |       ^^^^^^^^
 
-error: invalid path URI: expected EOF but found # at index 3
+error: invalid path URI: expected EOF but found '#' at index 3
   --- help: expected path in origin form: "/path/<param>"
   --> $DIR/route-path-bad-syntax.rs:28:7
    |

core/http/src/parse/uri/error.rs

@@ -73,8 +73,8 @@ mod tests {
 
     #[test]
     fn check_display() {
-        check_err!("a" => "expected token / but found a at index 0");
-        check_err!("?" => "expected token / but found ? at index 0");
-        check_err!("这" => "expected token / but found byte 232 at index 0");
+        check_err!("a" => "expected token '/' but found 'a' at index 0");
+        check_err!("?" => "expected token '/' but found '?' at index 0");
+        check_err!("这" => "expected token '/' but found byte 232 at index 0");
     }
 }