Make the standard benchmark file tougher on Haml.

This is done by highlighting the current worst performance area:
dynamic attributes.

test/haml/erb/standard.erb

@@ -18,7 +18,7 @@
     <% end -%>
     <div id='body'><%= " Quotes should be loved! Just like people!" %></div>
     Wow.
-    <p>
+    <p code="<%= 1 + 2 %>">
       <%= "Holy cow        " +
           "multiline       " +
           "tags!           " +
@@ -28,7 +28,8 @@
           n.to_s
         }.join("|") %>
     </p>
-    <div class='silent'>
+    <% bar = 17 %>
+    <div class='silent' foo="<%= bar %>">
       <% foo = String.new
          foo << "this"
          foo << " shouldn't"

test/haml/results/standard.xhtml

@@ -134,12 +134,12 @@
     118
     119
     Wow.|
-    <p>
+    <p code='3'>
       Holy cow        multiline       tags!           A pipe (|) even!
       PipesIgnored|PipesIgnored|PipesIgnored|
       1|2|3
     </p>
-    <div class='silent'>
+    <div class='silent' foo='17'>
       this shouldn't evaluate but now it should!
     </div>
     <ul class='really cool'>

test/haml/templates/standard.haml

@@ -14,7 +14,7 @@
     - 120.times do |number|
       = number
     Wow.|
-    %p
+    %p{:code => 1 + 2}
       = "Holy cow        " + |
         "multiline       " + |      
         "tags!           " + |
@@ -23,7 +23,8 @@
       = [1, 2, 3].collect { |n|     |
           n.to_s                    |
         }.join("|")                 |
-    %div.silent
+    - bar = 17
+    %div.silent{:foo => bar}
       - foo = String.new
       - foo << "this"
       - foo << " shouldn't"