fixes

9-regular-expressions/11-regexp-alternation/02-find-matching-bbtags/solution.md

@@ -1,14 +1,14 @@
 
 Opening tag is `pattern:\[(b|url|quote)\]`.
 
-Then to find everything till the closing tag -- let's the pattern `pattern:[\s\S]*?` to match any character including the newline and then a backreference to the closing tag.
+Then to find everything till the closing tag -- let's use the pattern `pattern:.*?` with flag `s` to match any character including the newline and then add a backreference to the closing tag.
 
-The full pattern: `pattern:\[(b|url|quote)\][\s\S]*?\[/\1\]`.
+The full pattern: `pattern:\[(b|url|quote)\].*?\[/\1\]`.
 
 In action:
 
 ```js run
-let reg = /\[(b|url|quote)\][\s\S]*?\[\/\1\]/g;
+let reg = /\[(b|url|quote)\].*?\[\/\1\]/gs;
 
 let str = `
   [b]hello![/b]

9-regular-expressions/11-regexp-alternation/02-find-matching-bbtags/task.md

@@ -32,7 +32,7 @@ Create a regexp to find all BB-tags with their contents.
 For instance:
 
 ```js
-let reg = /your regexp/g;
+let reg = /your regexp/flags;
 
 let str = "..[url]http://google.com[/url]..";
 alert( str.match(reg) ); // [url]http://google.com[/url]
@@ -41,7 +41,7 @@ alert( str.match(reg) ); // [url]http://google.com[/url]
 If tags are nested, then we need the outer tag (if we want we can continue the search in its content):
 
 ```js
-let reg = /your regexp/g;
+let reg = /your regexp/flags;
 
 let str = "..[url][b]http://google.com[/b][/url]..";
 alert( str.match(reg) ); // [url][b]http://google.com[/b][/url]

9-regular-expressions/11-regexp-alternation/03-match-quoted-string/task.md

@@ -2,15 +2,15 @@
 
 Create a regexp to find strings in double quotes `subject:"..."`.
 
-The important part is that strings should support escaping, in the same way as JavaScript strings do. For instance, quotes can be inserted as `subject:\"` a newline as `subject:\n`, and the slash itself as `subject:\\`.
+The strings should support escaping, the same way as JavaScript strings do. For instance, quotes can be inserted as `subject:\"` a newline as `subject:\n`, and the slash itself as `subject:\\`.
 
 ```js
 let str = "Just like \"here\".";
 ```
 
-For us it's important that an escaped quote `subject:\"` does not end a string.
+Please note, in particular, that an escaped quote `subject:\"` does not end a string.
 
-So we should look from one quote to the other ignoring escaped quotes on the way.
+So we should search from one quote to the other ignoring escaped quotes on the way.
 
 That's the essential part of the task, otherwise it would be trivial.
 

9-regular-expressions/11-regexp-alternation/article.md

@@ -31,7 +31,7 @@ To separate a part of the pattern for alternation we usually enclose it in paren
 
 ## Regexp for time
 
-In previous chapters there was a task to build a regexp for searching time in the form `hh:mm`, for instance `12:00`. But a simple `pattern:\d\d:\d\d` is too vague. It accepts `25:99` as the time (99 seconds is valid, but shouldn't be).
+In previous chapters there was a task to build a regexp for searching time in the form `hh:mm`, for instance `12:00`. But a simple `pattern:\d\d:\d\d` is too vague. It accepts `25:99` as the time (as 99 seconds match the pattern).
 
 How can we make a better one?