add a comma

Author: Rnbsov

1-js/05-data-types/03-string/article.md

@@ -48,7 +48,7 @@ let guestList = "Guests: // Error: Unexpected token ILLEGAL
   * John";
 ```
 
-Single and double quotes come from ancient times of language creation when the need for multiline strings was not taken into account. Backticks appeared much later and thus are more versatile.
+Single and double quotes come from ancient times of language creation, when the need for multiline strings was not taken into account. Backticks appeared much later and thus are more versatile.
 
 Backticks also allow us to specify a "template function" before the first backtick. The syntax is: <code>func&#96;string&#96;</code>. The function `func` is called automatically, receives the string and embedded expressions and can process them. This is called "tagged templates". This feature makes it easier to implement custom templating, but is rarely used in practice. You can read more about it in the [manual](mdn:/JavaScript/Reference/Template_literals#Tagged_templates).