Update README.md (#1526)

Author: coliff

README.md

@@ -42,42 +42,43 @@ There are two ways to install HTMLHint: globally and locally.
 
 In case you want to include HTMLHint as part of your project, you can install it locally using npm:
 
-```
+```bash
 $ npm install htmlhint --save-dev
 ```
 
 After that, You can run HTMLHint on any file or directory like this:
 
-```
+```bash
 $ ./node_modules/.bin/htmlhint www/index.html
 $ ./node_modules/.bin/htmlhint www/**/*.html
 ```
 
-Or, you can use HTMLHint linter programatically, like this:
-```
-import { HTMLHint } from 'htmlhint';
-const htmlVerificationHints = HTMLHint.verify(localHtmlContent);
-console.log('htmlVerificationHints', htmlVerificationHints); // this logs a list of `Hint`s which contain information on all linting errors
+Or, you can use HTMLHint linter programmatically, like this:
+
+```js
+import { HTMLHint } from 'htmlhint'
+const htmlVerificationHints = HTMLHint.verify(localHtmlContent)
+console.log('htmlVerificationHints', htmlVerificationHints) // this logs a list of `Hint`s which contain information on all linting errors
 ```
 
 ### Global Installation and Usage
 
 If you want to make HTMLHint available to tools that run across all of your projects, you can install HTMLHint globally using npm:
 
-```
+```bash
 $ npm install htmlhint -g
 ```
 
 After that, you can run HTMLHint on any file like this:
 
-```
+```bash
 $ htmlhint www/index.html
 $ htmlhint www/**/*.html
 ```
 
 You can even launch HTMLHint to analyze an URL:
 
-```
+```bash
 $ htmlhint https://htmlhint.com/
 ```
 
@@ -87,20 +88,20 @@ $ htmlhint https://htmlhint.com/
 
 Search `.htmlhintrc` file in current directory and all parent directories:
 
-```
+```bash
 $ htmlhint
 $ htmlhint test.html
 ```
 
 Custom config file:
 
-```
+```bash
 $ htmlhint --config htmlhint.conf test.html
 ```
 
 Custom rules:
 
-```
+```bash
 $ htmlhint --rules tag-pair,id-class-value=underline index.html
 ```