Merge pull request #900 from atulsm/master

Fixing the syntax typo in prompt function definition

1-js/02-first-steps/09-alert-prompt-confirm/article.md

@@ -27,7 +27,7 @@ The mini-window with the message is called a *modal window*. The word "modal" me
 The function `prompt` accepts two arguments:
 
 ```js no-beautify
-result = prompt(title[, default]);
+result = prompt(title, [default]);
 ```
 
 It shows a modal window with a text message, an input field for the visitor, and the buttons OK/CANCEL.

1-js/02-first-steps/16-javascript-specials/article.md

@@ -102,7 +102,7 @@ More in: <info:variables> and <info:types>.
 
 We're using a browser as a working environment, so basic UI functions will be:
 
-[`prompt(question[, default])`](mdn:api/Window/prompt)
+[`prompt(question, [default])`](mdn:api/Window/prompt)
 : Ask a `question`, and return either what the visitor entered or `null` if they pressed "cancel".
 
 [`confirm(question)`](mdn:api/Window/confirm)