Fix content_for specs

sinatra-contrib/spec/content_for/layout.erb

@@ -1,2 +1 @@
-<%= yield if block_given? %>
 <%= yield_content :foo %>

sinatra-contrib/spec/content_for/layout.erubis

@@ -1,2 +1 @@
-<%= yield if block_given? %>
 <%= yield_content :foo %>

sinatra-contrib/spec/content_for/layout.haml

@@ -1,2 +1 @@
-= yield if block_given?
 = yield_content :foo

sinatra-contrib/spec/content_for/layout.slim

@@ -1,2 +1 @@
-== yield if block_given?
 = yield_content :foo

sinatra-contrib/spec/content_for/yield_block.erb

@@ -1 +1 @@
-<% yield_content :bar do %>bar<% end %>
+<% yield_content :foo do %>bar<% end %>

sinatra-contrib/spec/content_for/yield_block.erubis

@@ -1 +1 @@
-<% yield_content :bar do %>bar<% end %>
+<% yield_content :foo do %>bar<% end %>

sinatra-contrib/spec/content_for/yield_block.haml

@@ -1,2 +1,2 @@
-= yield_content :bar  do
+= yield_content :foo  do
   bar

sinatra-contrib/spec/content_for/yield_block.slim

@@ -1,2 +1,2 @@
-= yield_content :bar  do
+= yield_content :foo  do
   | bar

sinatra-contrib/spec/content_for_spec.rb

@@ -205,11 +205,16 @@ describe Sinatra::ContentFor do
             end
           end
 
-          it 'renders default content' do
-            expect(get('/yield_block')).to be_ok
+          it 'renders content' do
+            expect(get('/yield_block/different_key')).to be_ok
             expect(body).to eq("bar")
           end
 
+          it 'renders default content' do
+            expect(get('/yield_block/same_key')).to be_ok
+            expect(body).to eq("foo")
+          end
+
           it 'renders content set as parameter' do
             expect(get('/parameter_value')).to be_ok
             expect(body).to eq("foo")