Update various doc (#2086)

* Fix typo and trim spaces

* Use bash syntax for all shell scripts

* Update CI badge link

LICENSE

@@ -21,8 +21,9 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 # SPECIAL NOTE:
+
 Many of the lexers in this project are adaptations of those in Pygments
-(pygments.org).  The license for Pygments is as follows:
+(pygments.org). The license for Pygments is as follows:
 
 # BEGIN pygments/LICENSE #
 

README.md

@@ -1,6 +1,6 @@
 # Rouge
 
-![Build Status](https://github.com/rouge-ruby/rouge/actions/workflows/ruby.yml/badge.svg)
+[![Build Status](https://github.com/rouge-ruby/rouge/actions/workflows/ruby.yml/badge.svg)](https://github.com/rouge-ruby/rouge/actions/workflows/ruby.yml)
 [![Gem Version](https://badge.fury.io/rb/rouge.svg)](https://rubygems.org/gems/rouge)
 [![YARD Docs](http://img.shields.io/badge/yard-docs-blue.svg)](https://rouge-ruby.github.io/docs/)
 
@@ -23,7 +23,7 @@ gem 'rouge'
 
 or
 
-```sh
+```bash
 gem install rouge
 ```
 
@@ -67,7 +67,7 @@ use and whether to enable line numbers or not. More information is available in
 Rouge ships with a `rougify` command which allows you to easily highlight files
 in your terminal:
 
-```sh
+```bash
 rougify foo.rb
 rougify style monokai.sublime > syntax.css
 ```
@@ -278,7 +278,7 @@ test file by setting the `TEST` environment variable to the path of the desired
 test. For example, to test just the _`ruby` lexer_ (located at path
 `spec/lexers/ruby_spec.rb`) simply run the following:
 
-```sh
+```bash
 TEST=spec/lexers/ruby_spec.rb rake
 ```
 

docs/DevEnvironment.md

@@ -70,7 +70,7 @@ fork. Select your account and—boom!—you've just forked Rouge.
 The next thing to do is to get your fork onto your computer. Git makes this
 easy. In the directory you want to hold your repository, type:
 
-```shell
+```bash
 git clone [email protected]:<your_github_account_name>/rouge.git
 ```
 
@@ -87,7 +87,7 @@ of time developing Rouge, this is something you'll want to do.
 Fortunately, it's easy to add additional remote repositories. To add the
 official Rouge repository (with the name `upstream`), type the following:
 
-```shell
+```bash
 git remote add upstream https://github.com/rouge-ruby/rouge.git
 ```
 
@@ -116,7 +116,7 @@ If you already develop with Ruby, you no doubt have Bundler installed. You can
 check if you do by typing `bundle -v` at the command line. If you don't see the
 version number then you need to install Bundler. To do this, type:
 
-```shell
+```bash
 gem install bundler
 ```
 
@@ -128,7 +128,7 @@ that's complete, you're ready to rock.
 Rouge comes with a list of gems it depends upon called a _Gemfile_. Make sure
 you're at the top level of your clone of your repository and type:
 
-```shell
+```bash
 bundle config set path 'vendor'
 bundle install
 ```
@@ -149,7 +149,7 @@ type `bundle exec rake` rather than just `rake`.
 
 It's best to develop in a _branch_. You can create a branch by typing:
 
-```shell
+```bash
 git checkout -b <name_of_your_branch>
 ```
 

docs/LexerDevelopment.md

@@ -473,7 +473,7 @@ that there is no file extension.
 
 ### Visual Samples
 
-A visual sample is a file that includes a representive sample of the syntax of
+A visual sample is a file that includes a representative sample of the syntax of
 your language. The sample should be long enough to reasonably demonstrate the
 correct lexing of the language but does not need to offer complete coverage.
 While it can be tempting to copy and paste code found online, please refrain