fix some typos

doc-src/Rakefile

@@ -25,7 +25,7 @@ task :watch do
 
   rebuild_site = lambda do |base, relative|
     if relative && relative =~ /\.s[ac]ss/
-      puts ">>> Change Detected to #{relative} : updating stylsheets <<<"
+      puts ">>> Change Detected to #{relative} : updating stylesheets <<<"
       system "bundle exec compass compile"
     else
       if !relative

doc-src/content/reference/compass/utilities/sprites/sprite_img.haml

@@ -16,14 +16,14 @@ classnames:
         a.twitter
           +sprite-img("icons-32.png", 1)
         a.facebook
-          +sprite-img("icons-32png", 2)
+          +sprite-img("icons-32.png", 2)
     
     **Example 2** Sharing a common base:
     
         a
           +sprite-background("icons-32.png")
-          a.twitter
+          &.twitter
             +sprite-column(1)
-          a.facebook
+          &.facebook
             +sprite-row(2)