benchmark,doc,lib,test: capitalize comments

PR-URL: nodejs#26483
Reviewed-By: Vse Mozhet Byt <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>

Author: BridgeAR

benchmark/_cli.js

@@ -65,7 +65,7 @@ function CLI(usage, settings) {
       // item arguments
       this.items.push(arg);
 
-      // the next value must be an item
+      // The next value must be an item
       mode = 'item';
     } else {
       // Bad case, abort

benchmark/net/net-c2s-cork.js

@@ -1,4 +1,4 @@
-// test the speed of .pipe() with sockets
+// Test the speed of .pipe() with sockets
 'use strict';
 
 const common = require('../common.js');
@@ -78,7 +78,7 @@ Writer.prototype.write = function(chunk, encoding, cb) {
   return true;
 };
 
-// doesn't matter, never emits anything.
+// Doesn't matter, never emits anything.
 Writer.prototype.on = function() {};
 Writer.prototype.once = function() {};
 Writer.prototype.emit = function() {};