Merge pull request #645 from caspringer/patch-3

Fix comma usage

Author: iliakan

1-js/05-data-types/10-date/article.md

@@ -2,7 +2,7 @@
 
 Let's meet a new built-in object: [Date](mdn:js/Date). It stores the date, time and provides methods for date/time management.
 
-For instance, we can use it to store creation/modification times, or to measure time, or just to print out the current date.
+For instance, we can use it to store creation/modification times, to measure time, or just to print out the current date.
 
 ## Creation