Fix the fenced code in the Ruby tutorial.

Author: mblayman

testing-with-tap/ruby.md

@@ -7,41 +7,39 @@ title: Testing with Ruby
 
 Testing with Ruby is pretty easy, however, there is a lesser known Ruby program, that produces TAP output (on demand). This handy program is [bacon](http://github.com/chneukirchen/bacon/tree/master). You can install it using the RubyGems Ruby package management system. Just do (possibly as a privileged user):
 
-```
-   # gem install bacon
+```bash
+$ gem install bacon
 ```
 
 Now you can create tests. Create a Ruby file test.rb (or something like that):
 
-```
-
-  describe "a example test suite" do
-    it "should consider true as the truth" do
-      true.should.be.true
-    end
-    
-    it "should consider false as the truth, too" do
-      false.should.be.true
-    end
+```ruby
+describe "a example test suite" do
+  it "should consider true as the truth" do
+    true.should.be.true
   end
 
+  it "should consider false as the truth, too" do
+    false.should.be.true
+  end
+end
 ```
 
 Once you created your this file, you can issue the command
 
-```
+```bash
 $ bacon test.rb --tap
 ```
 
 which, in turn, produces the following TAP output (Version 12)
 
 ```
- ok 1   - should consider true as the truth
- not ok 2 - should consider false as the truth, too: FAILED
- # Bacon::Error: false.true?() failed
- # 	./test.rb:7: a example test suite - should consider false as the truth, too
- # 	./test.rb:6
- # 	./test.rb:1
- 1..2
- # 2 tests, 2 assertions, 1 failures, 0 errors
-```
+ok 1   - should consider true as the truth
+not ok 2 - should consider false as the truth, too: FAILED
+# Bacon::Error: false.true?() failed
+# 	./test.rb:7: a example test suite - should consider false as the truth, too
+# 	./test.rb:6
+# 	./test.rb:1
+1..2
+# 2 tests, 2 assertions, 1 failures, 0 errors
+```