README.md: use spaces for code

README.md

@@ -3,50 +3,44 @@
 [![Build Status](https://travis-ci.org/gewo/hmac_auth.png)](https://travis-ci.org/gewo/hmac_auth/)
 [![Code Coverage](https://coveralls.io/repos/gewo/hmac_auth/badge.png)](https://coveralls.io/r/gewo/hmac_auth)
 
-```
-    __  ____  ______   _________         __  __
-   / / / /  |/  /   | / ____/   | __  __/ /_/ /_
-  / /_/ / /|_/ / /| |/ /   / /| |/ / / / __/ __ \
- / __  / /  / / ___ / /___/ ___ / /_/ / /_/ / / /
-/_/ /_/_/  /_/_/  |_\____/_/  |_\__,_/\__/_/ /_/
+        __  ____  ______   _________         __  __
+       / / / /  |/  /   | / ____/   | __  __/ /_/ /_
+      / /_/ / /|_/ / /| |/ /   / /| |/ / / / __/ __ \
+     / __  / /  / / ___ / /___/ ___ / /_/ / /_/ / / /
+    /_/ /_/_/  /_/_/  |_\____/_/  |_\__,_/\__/_/ /_/
 
-```
 
 Ruby gem providing HMAC based message signing and verification. Without
 fancy Rails integration.
 
 ## Installation
 
-```ruby
-gem 'hmac_auth'       # Gemfile
-gem install hmac_auth # manual
-```
+    gem 'hmac_auth'       # Gemfile
+    gem install hmac_auth # manual
 
 ## Usage
 
-```ruby
-# Configuration
-HMACAuth.secret      = 't0p_s3cr3!!eins1'
-HMACAuth.reject_keys = %w(action controller format)
-HMACAuth.valid_for   = 15.minutes
+    # Configuration
+    HMACAuth.secret      = 't0p_s3cr3!!eins1'
+    HMACAuth.reject_keys = %w(action controller format)
+    HMACAuth.valid_for   = 15.minutes
 
-to_be_signed = {
-  b: 2,
-  a: { d: 4, c: 3 }
-}
+    to_be_signed = {
+      b: 2,
+      a: { d: 4, c: 3 }
+    }
 
-signed = HMACAuth::Signature.sign to_be_signed
-# => Hash including 'timestamp' and 'signature'
+    signed = HMACAuth::Signature.sign to_be_signed
+    # => Hash including 'timestamp' and 'signature'
 
-HMACAuth::Signature.verify(signed)                        # => true
-HMACAuth::Signature.verify(signed.merge(evil: 'yes'))     # => false
-HMACAuth::Signature.verify(signed, secret: 'good guess?') # => false
+    HMACAuth::Signature.verify(signed)                        # => true
+    HMACAuth::Signature.verify(signed.merge(evil: 'yes'))     # => false
+    HMACAuth::Signature.verify(signed, secret: 'good guess?') # => false
 
-sleep 20.minutes
-HMACAuth::Signature.verify(signed)                        # => false
+    sleep 20.minutes
+    HMACAuth::Signature.verify(signed)                        # => false
 
-# That's it. Nothing more, nothing less.
-```
+    # That's it. Nothing more, nothing less.
 
 ## Contributing