core(navigation): improve url presentation in redirect warning message

lighthouse-cli/test/smokehouse/test-definitions/redirects-client-paint-server.js

@@ -52,7 +52,7 @@ const expectations = {
       },
     },
     runWarnings: [
-      /The page may not be loading as expected because your test URL \(.*js-redirect.html.*\) was redirected to .*redirects-final.html. Try testing the second URL directly./,
+      /The page may not be loading as expected because your test URL \(.*js-redirect.html.*\) was redirected to \(.*redirects-final.html \)—try testing the second URL directly./,
     ],
   },
 };

lighthouse-cli/test/smokehouse/test-definitions/redirects-history-push-state.js

@@ -35,7 +35,7 @@ const expectations = {
     audits: {
     },
     runWarnings: [
-      /The page may not be loading as expected because your test URL \(.*js-redirect.html.*\) was redirected to .*redirects-final.html\?pushState. Try testing the second URL directly./,
+      /The page may not be loading as expected because your test URL \(.*js-redirect.html.*\) was redirected to \(.*redirects-final.html\?pushState \)—try testing the second URL directly./,
     ],
   },
 };

lighthouse-cli/test/smokehouse/test-definitions/redirects-multiple-server.js

@@ -48,7 +48,7 @@ const expectations = {
       },
     },
     runWarnings: [
-      /The page may not be loading as expected because your test URL \(.*online-only.html.*\) was redirected to .*redirects-final.html. Try testing the second URL directly./,
+      /The page may not be loading as expected because your test URL \(.*online-only.html.*\) was redirected to \(.*redirects-final.html \)—try testing the second URL directly./,
     ],
   },
 };

lighthouse-cli/test/smokehouse/test-definitions/redirects-single-client.js

@@ -32,7 +32,7 @@ const expectations = {
     audits: {
     },
     runWarnings: [
-      /The page may not be loading as expected because your test URL \(.*js-redirect.html.*\) was redirected to .*redirects-final.html. Try testing the second URL directly./,
+      /The page may not be loading as expected because your test URL \(.*js-redirect.html.*\) was redirected to \(.*redirects-final.html \)—try testing the second URL directly./,
     ],
   },
 };

lighthouse-cli/test/smokehouse/test-definitions/redirects-single-server.js

@@ -49,7 +49,7 @@ const expectations = {
       },
     },
     runWarnings: [
-      /The page may not be loading as expected because your test URL \(.*online-only.html.*\) was redirected to .*redirects-final.html. Try testing the second URL directly./,
+      /The page may not be loading as expected because your test URL \(.*online-only.html.*\) was redirected to \(.*redirects-final.html \)—try testing the second URL directly./,
     ],
   },
 };

lighthouse-core/gather/driver/navigation.js

@@ -19,8 +19,7 @@ const UIStrings = {
    * @example {https://example.com/final/resolved/page} final
    */
   warningRedirected: 'The page may not be loading as expected because your test URL ' +
-  `({requested}) was redirected to {final}. ` +
-  'Try testing the second URL directly.',
+  `( {requested} ) was redirected to ( {final} )—try testing the second URL directly.`,
   /**
    * @description Warning that Lighthouse timed out while waiting for the page to load.
    */