Update Rakefile quotation syntax

Author: johndjameson

Rakefile

@@ -1,27 +1,27 @@
-desc "Generate flat files with Middleman"
+desc 'Generate flat files with Middleman'
 task :generate do
-  puts "## Generating site with Middleman"
-  system "rm -rf build"
-  system "./bin/middleman build --clean"
-  system "cp CNAME build/CNAME"
-  cd "build" do
-    system "touch .nojekyll"
-    system "git init"
-    system "git remote add origin git@github.com:mvcss/mvcss.github.com.git"
+  puts '## Generating site with Middleman'
+  system 'rm -rf build'
+  system 'bundle exec middleman build --clean'
+  system 'cp CNAME build/CNAME'
+  cd 'build' do
+    system 'touch .nojekyll'
+    system 'git init'
+    system 'git remote add origin git@github.com:mvcss/mvcss.github.com.git'
   end
 end
 
-desc "Push the build to GitHub"
+desc 'Push the build to GitHub'
 task :push do
-  puts "## Deploying build to GitHub Pages"
-  cd "build" do
-    system "git add ."
-    system "git add -u"
-    system "git commit -m \"Site updated at #{Time.now.utc}\""
-    system "git push origin master --force"
+  puts '## Deploying build to GitHub Pages'
+  cd 'build' do
+    system 'git add .'
+    system 'git add -u'
+    system "git commit -m \'Site updated at #{Time.now.utc}\'"
+    system 'git push origin master --force'
   end
 end
 
-desc "Generate flat files and deploy to GitHub Pages"
+desc 'Generate flat files and deploy to GitHub Pages'
 task :deploy => [:generate, :push] do
 end