Fix ruby warnings

Cleans up all warnings generated from Sinatra. There's still
a bunch of warnings coming from HAML, though. It would be nice
if we could use Kernel#warn for deprecation notices but that's
going to be annoying if there's a bunch of unrelated warnings
from other libs.

lib/sinatra/base.rb

@@ -70,7 +70,7 @@ module Sinatra
     def redirect(uri, *args)
       status 302
       response['Location'] = uri
-      halt *args
+      halt(*args)
     end
 
     # Halt processing and return the error status provided.
@@ -476,7 +476,7 @@ module Sinatra
           s !~ /\(.*\)/ }
         file = line.sub(/:\d+.*$/, '')
         if data = ::IO.read(file).split('__END__')[1]
-          data.gsub! /\r\n/, "\n"
+          data.gsub!(/\r\n/, "\n")
           template = nil
           data.each_line do |line|
             if line =~ /^@@\s*(.*)/

lib/sinatra/test.rb

@@ -10,6 +10,8 @@ module Sinatra::Test
     @app = Sinatra.new(base, &block)
   end
 
+  undef request if method_defined?(:request)
+
   def request(verb, path, *args)
     fail "@app not set - cannot make request" if @app.nil?
     @request = Rack::MockRequest.new(@app)

test/base_test.rb

@@ -49,7 +49,7 @@ describe 'Sinatra::Base' do
 
   it 'can take multiple definitions of a route' do
     app = mock_app {
-      user_agent /Foo/
+      user_agent(/Foo/)
       get '/foo' do
         'foo'
       end

test/routing_test.rb

@@ -278,7 +278,7 @@ describe "Routing" do
 
   it "passes to the next route when user_agent does not match" do
     mock_app {
-      user_agent /Foo/
+      user_agent(/Foo/)
       get '/foo' do
         'Hello World'
       end
@@ -293,7 +293,7 @@ describe "Routing" do
 
   it "makes captures in user agent pattern available in params[:agent]" do
     mock_app {
-      user_agent /Foo (.*)/
+      user_agent(/Foo (.*)/)
       get '/foo' do
         'Hello ' + params[:agent].first
       end