Revert "Don't strip newlines in Node#text"

This reverts commit 8abc10a9cc.

See comments at
8abc10a9cc

Capybara master has a spec to ensure that #text strips whitespace:
060fc3a72d

That test isn't in the Capybara 1.1 branch hence we weren't failing.
However we should honour the correct behaviour.

README.md

@@ -216,9 +216,7 @@ makes debugging easier). Running `rake autocompile` will watch the
     [Issue #127]
 
 *   Use `el.innerText` for `Node#text`. This ensures that e.g. `<br>` is
-    returned as a newline. It also simplifies the method. [Issue #139]
-
-*   Don't strip newlines in `Node#text`. [Issue #128]
+    returned as a space. It also simplifies the method. [Issue #139]
 
 *   Fix status code support when a response redirects to another URL.
     This was previously tested to ensure it would return the status code

lib/capybara/poltergeist/node.rb

@@ -31,7 +31,7 @@ module Capybara::Poltergeist
     end
 
     def text
-      command :text
+      command(:text).strip.gsub(/\s+/, ' ')
     end
 
     def [](name)

spec/integration/session_spec.rb

@@ -313,7 +313,7 @@ describe Capybara::Session do
 
     it 'returns BR as a space in #text' do
       @session.visit '/poltergeist/simple'
-      @session.find(:css, '#break').text.should == "Foo\nBar"
+      @session.find(:css, '#break').text.should == "Foo Bar"
     end
   end
 end