child_process: fix arguments comments

Fixes the arguments comments for execFileSync and other related minor
inconsistencies in commented arguments in the same file.

PR-URL: https://github.com/nodejs/io.js/pull/2161
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

lib/child_process.js

@@ -107,7 +107,7 @@ exports.exec = function(command /*, options, callback */) {
 };
 
 
-exports.execFile = function(file /* args, options, callback */) {
+exports.execFile = function(file /*, args, options, callback*/) {
   var args, callback;
   var options = {
     encoding: 'utf8',
@@ -443,7 +443,7 @@ function checkExecSyncError(ret) {
 }
 
 
-function execFileSync(/*command, options*/) {
+function execFileSync(/*command, args, options*/) {
   var opts = normalizeSpawnArguments.apply(null, arguments);
   var inheritStderr = !opts.options.stdio;
 
@@ -462,7 +462,7 @@ function execFileSync(/*command, options*/) {
 exports.execFileSync = execFileSync;
 
 
-function execSync(/*comand, options*/) {
+function execSync(/*command, options*/) {
   var opts = normalizeExecArgs.apply(null, arguments);
   var inheritStderr = opts.options ? !opts.options.stdio : true;