fix

1-js/01-getting-started/1-intro/article.md

@@ -12,7 +12,7 @@ Scripts are provided and executed as plain text. They don't need special prepara
 
 In this aspect, JavaScript is very different from another language called [Java](https://en.wikipedia.org/wiki/Java_(programming_language)).
 
-```smart header="Why <u>Java</u>Script?"
+```smart header="Why is it called <u>Java</u>Script?"
 When JavaScript was created, it initially had another name: "LiveScript". But Java was very popular at that time, so it was decided that positioning a new language as a "younger brother" of Java would help.
 
 But as it evolved, JavaScript became a fully independent language with its own specification called [ECMAScript](http://en.wikipedia.org/wiki/ECMAScript), and now it has no relation to Java at all.

9-regular-expressions/02-regexp-character-classes/article.md

@@ -144,6 +144,17 @@ That's what flag `pattern:s` does. If a regexp has it, then a dot `pattern:.` ma
 alert( "A\nB".match(/A.B/s) ); // A\nB (match!)
 ```
 
+````warn header="Not supported in Firefox, IE, Edge"
+Check <https://caniuse.com/#search=dotall> for the most recent state of support.
+
+Luckily, there's an alternative. We can use a regexp like `pattern:[\s\S]` to match "any character".
+
+```js run
+alert( "A\nB".match(/A[\s\S]B/) ); // A\nB (match!)
+```
+This works everywhere.
+````
+
 ````warn header="Pay attention to spaces"
 Usually we pay little attention to spaces. For us strings `subject:1-5` and `subject:1 - 5` are nearly identical.