Prettier code examples in readme

Author: petercoles

readme.md

@@ -18,15 +18,15 @@ Data can be returned as a lookup array or an array of key-value pairs, where bot
 
 At the command line run
 
-```
+```shell
 composer require petercoles/multilingual-language-list
 ```
 
 If you're using Laravel 5.5 or later (and haven't disabled package discovery), you're done. Move on to the usage section below.
 
 If you're using an older version of Laravel, then add the service provider to the providers entry in your config/app.php file
 
-```
+```php
     'providers' => [
         // ...
         PeterColes\Languages\LanguagesServiceProvider::class,
@@ -36,7 +36,7 @@ If you're using an older version of Laravel, then add the service provider to th
 
 An optional facade is also available and can be enabled by adding the following to you config/app.php's aliases array
 
-```
+```php
 'Languages' => PeterColes\Languages\LanguagesFacade::class,
 ```
 
@@ -55,7 +55,7 @@ The resulting collection will be cast to a json object by Laravel if returned as
 
 #### Example: Default settigs
 
-```
+```php
 Languages::lookup();
 
 // returns
@@ -70,7 +70,7 @@ Languages::lookup();
 
 #### Example: Limiting the languages displayed
 
-```
+```php
 Languages::lookup(['en', 'fr', 'de']);
 
 // returns
@@ -84,7 +84,7 @@ Languages::lookup(['en', 'fr', 'de']);
 
 #### Example: Changing the display language
 
-```
+```php
 Languages::lookup(['en', 'fr', 'de'], 'fr');
 
 // returns
@@ -98,7 +98,7 @@ Languages::lookup(['en', 'fr', 'de'], 'fr');
 
 #### Example: Reverse lookups
 
-```
+```php
 Languages::lookup(['en', 'fr', 'de'], 'fr', true);
 
 // returns
@@ -112,7 +112,8 @@ Languages::lookup(['en', 'fr', 'de'], 'fr', true);
 ```
 
 #### Example: Non-latin character sets are supported too
-```
+
+```php
 Languages::lookup(['en', 'fr', 'de', 'bs'], 'bs_Cyrl');
 
 // returns
@@ -135,7 +136,8 @@ The ```keyValue``` method takes four optional parameters:
 * $value - default "value"
 
 #### Example: Default settings
-```
+
+```php
 Languages::keyValue();
 
 // returns
@@ -148,9 +150,10 @@ Languages::keyValue();
   {"key": "zu", "value": "Zulu"}
 ]
 ```
+
 #### Example: Include "minor" languages
 
-```
+```php
 Languages::keyValue('minor');
 
 // returns
@@ -168,7 +171,7 @@ Languages::keyValue('minor');
 
 #### Example: The kitchen sink - custom list, in non-Latin language with custom indices
 
-```
+```php
 Languages::keyValue(['en', 'ja', 'zh'], 'zh', 'label', 'text');
 
 // returns
@@ -187,7 +190,8 @@ Sometimes you might want to display a list of languages where each language is e
 By using the special "mixed" locale as the second parameter and a custom array as the first, the languages in that custom array will each be rendered in their own localised form, in the order given in the first parameter.
 
 #### Example: lookup
-```
+
+```php
 Languages::lookup(['en', 'fr', 'de', 'ja', 'ru', 'zh'], 'mixed');
 
 // returns
@@ -204,7 +208,8 @@ Languages::lookup(['en', 'fr', 'de', 'ja', 'ru', 'zh'], 'mixed');
 ```
 
 #### Example: key-value
-```
+
+```php
 Languages::keyValue(['en', 'fr', 'de', 'ja', 'ru', 'zh'], 'mixed');
 
 // returns