fixup! test: fix spelling in test case comments

Author: tniessen

test/parallel/test-http-agent-keepalive.js

@@ -102,7 +102,7 @@ function remoteClose() {
 }
 
 function remoteError() {
-  // remove server will destroy the socket
+  // remote server will destroy the socket
   const req = get('/error', common.mustNotCall());
   req.on('error', common.mustCall((err) => {
     assert(err);

test/parallel/test-http-extra-response.js

@@ -51,7 +51,6 @@ const server = net.createServer(function(socket) {
 
     if (postBody.includes('\r\n')) {
       socket.write(fullResponse);
-      // I wrote the response twice, what a terrible HTTP server I am.
       socket.end(fullResponse);
     }
   });

test/parallel/test-promises-unhandled-rejections.js

@@ -293,7 +293,7 @@ asyncTest('While inside setImmediate, catching a rejected promise derived ' +
   });
 });
 
-// State adaption tests
+// State adaptation tests
 asyncTest('catching a promise which is asynchronously rejected (via ' +
           'resolution to an asynchronously-rejected promise) prevents' +
           ' unhandledRejection', function(done) {