Replace unicode with Unicode all over the book

9-regular-expressions/01-regexp-introduction/article.md

@@ -56,7 +56,7 @@ There are only 6 of them in JavaScript:
 : Enables "dotall" mode, that allows a dot `pattern:.` to match newline character `\n` (covered in the chapter <info:regexp-character-classes>).
 
 `pattern:u`
-: Enables full unicode support. The flag enables correct processing of surrogate pairs. More about that in the chapter <info:regexp-unicode>.
+: Enables full Unicode support. The flag enables correct processing of surrogate pairs. More about that in the chapter <info:regexp-unicode>.
 
 `pattern:y`
 : "Sticky" mode: searching at the exact position in the text  (covered in the chapter <info:regexp-sticky>)

9-regular-expressions/03-regexp-unicode/article.md

@@ -4,9 +4,9 @@ JavaScript uses [Unicode encoding](https://en.wikipedia.org/wiki/Unicode) for st
 
 That range is not big enough to encode all possible characters, that's why some rare characters are encoded with 4 bytes, for instance like `𝒳` (mathematical X) or `😄` (a smile), some hieroglyphs and so on.
 
-Here are the unicode values of some characters:
+Here are the Unicode values of some characters:
 
-| Character  | Unicode | Bytes count in unicode  |
+| Character  | Unicode | Bytes count in Unicode  |
 |------------|---------|--------|
 | a | `0x0061` |  2 |
 | ≈ | `0x2248` |  2 |
@@ -121,7 +121,7 @@ alert("number: xAF".match(regexp)); // xAF
 
 Let's look for Chinese hieroglyphs.
 
-There's a unicode property `Script` (a writing system), that may have a value: `Cyrillic`, `Greek`, `Arabic`, `Han` (Chinese) and so on, [here's the full list](https://en.wikipedia.org/wiki/Script_(Unicode)).
+There's a Unicode property `Script` (a writing system), that may have a value: `Cyrillic`, `Greek`, `Arabic`, `Han` (Chinese) and so on, [here's the full list](https://en.wikipedia.org/wiki/Script_(Unicode)).
 
 To look for characters in a given writing system we should use `pattern:Script=<value>`, e.g. for Cyrillic letters: `pattern:\p{sc=Cyrillic}`, for Chinese hieroglyphs: `pattern:\p{sc=Han}`, and so on:
 
@@ -135,7 +135,7 @@ alert( str.match(regexp) ); // 你,好
 
 ### Example: currency
 
-Characters that denote a currency, such as `$`, `€`, `¥`, have unicode property  `pattern:\p{Currency_Symbol}`, the short alias: `pattern:\p{Sc}`.
+Characters that denote a currency, such as `$`, `€`, `¥`, have Unicode property  `pattern:\p{Currency_Symbol}`, the short alias: `pattern:\p{Sc}`.
 
 Let's use it to look for prices in the format "currency, followed by a digit":
 

9-regular-expressions/08-regexp-character-sets-and-ranges/article.md

@@ -57,16 +57,16 @@ For instance:
 
 - **\d** -- is the same as `pattern:[0-9]`,
 - **\w** -- is the same as `pattern:[a-zA-Z0-9_]`,
-- **\s** -- is the same as `pattern:[\t\n\v\f\r ]`, plus few other rare unicode space characters.
+- **\s** -- is the same as `pattern:[\t\n\v\f\r ]`, plus few other rare Unicode space characters.
 ```
 
 ### Example: multi-language \w
 
 As the character class `pattern:\w` is a shorthand for `pattern:[a-zA-Z0-9_]`, it can't find Chinese hieroglyphs, Cyrillic letters, etc.
 
-We can write a more universal pattern, that looks for wordly characters in any language. That's easy with unicode properties: `pattern:[\p{Alpha}\p{M}\p{Nd}\p{Pc}\p{Join_C}]`.
+We can write a more universal pattern, that looks for wordly characters in any language. That's easy with Unicode properties: `pattern:[\p{Alpha}\p{M}\p{Nd}\p{Pc}\p{Join_C}]`.
 
-Let's decipher it. Similar to `pattern:\w`, we're making a set of our own that includes characters with following unicode properties:
+Let's decipher it. Similar to `pattern:\w`, we're making a set of our own that includes characters with following Unicode properties:
 
 - `Alphabetic` (`Alpha`) - for letters,
 - `Mark` (`M`) - for accents,
@@ -85,7 +85,7 @@ let str = `Hi 你好 12`;
 alert( str.match(regexp) ); // H,i,你,好,1,2
 ```
 
-Of course, we can edit this pattern: add unicode properties or remove them. Unicode properties are covered in more details in the article <info:regexp-unicode>.
+Of course, we can edit this pattern: add Unicode properties or remove them. Unicode properties are covered in more details in the article <info:regexp-unicode>.
 
 ```warn header="Unicode properties aren't supported in Edge and Firefox"
 Unicode properties `pattern:p{…}` are not yet implemented in Edge and Firefox. If we really need them, we can use library [XRegExp](http://xregexp.com/).