Fixed Typo in comments

src/sentiment-analysis.js

@@ -1,7 +1,7 @@
 /* This file contains the code for analyzing blog posts text to identify the
  * negative or positve words being used in a post and return a summary of it
  * along with a score. The file uses a node module called sentiment to implement
- * the functionality of analyzing text of blogs. The function accepts striped
+ * the functionality of analyzing text of blogs. The function accepts stripped
  * HTML text as parameters i.e text containg no tags, and returns a promise
  * object whcih contains the result
 */