refactor(ext): align error messages (#25914)

Aligns the error messages in the ext folder to be in-line with the Deno
style guide.

https://github.com/denoland/deno/issues/25269

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ext/net/02_tls.js

@@ -124,17 +124,19 @@ function loadTlsKeyPair(api, {
 
   // Check for "pem" format
   if (keyFormat !== undefined && keyFormat !== "pem") {
-    throw new TypeError('If `keyFormat` is specified, it must be "pem"');
+    throw new TypeError(
+      `If "keyFormat" is specified, it must be "pem": received "${keyFormat}"`,
+    );
   }
 
   if (cert !== undefined && key === undefined) {
     throw new TypeError(
-      `If \`cert\` is specified, \`key\` must be specified as well for \`${api}\`.`,
+      `If \`cert\` is specified, \`key\` must be specified as well for \`${api}\``,
     );
   }
   if (cert === undefined && key !== undefined) {
     throw new TypeError(
-      `If \`key\` is specified, \`cert\` must be specified as well for \`${api}\`.`,
+      `If \`key\` is specified, \`cert\` must be specified as well for \`${api}\``,
     );
   }
 

ext/url/00_url.js

@@ -139,7 +139,7 @@ class URLSearchParams {
           throw new TypeError(
             `${prefix}: Item ${
               i + 0
-            } in the parameter list does have length 2 exactly.`,
+            } in the parameter list does have length 2 exactly`,
           );
         }
         return [pair[0], pair[1]];