Use shortcut for blocks

Author: sobrinho

lib/httplog/adapters/httpclient.rb

@@ -19,7 +19,7 @@ def do_get_block(req, proxy, conn, &block)
       request_uri = req.header.request_uri
       if HttpLog.url_approved?(request_uri)
         res = conn.pop
-        headers = res.headers.transform_keys { |key| key.downcase }
+        headers = res.headers.transform_keys(&:downcase)
 
         HttpLog.call(
           method: req.header.request_method,

lib/httplog/adapters/patron.rb

@@ -10,7 +10,7 @@ def request(action_name, url, headers, options = {})
         end
 
         if HttpLog.url_approved?(url)
-          normalized_headers = @response.headers.transform_keys { |key| key.downcase }
+          normalized_headers = @response.headers.transform_keys(&:downcase)
 
           HttpLog.call(
             method: action_name,

spec/support/test_server.rb

@@ -29,7 +29,7 @@ def call(env)
           headers['Content-Type'] = 'application/json' if path =~ /json/
           headers['Content-Encoding'] = 'gzip' if File.extname(file) == '.gz'
 
-          headers.transform_keys! { |key| key.downcase } if params['downcase']
+          headers = headers.transform_keys(&:downcase) if params['downcase']
 
           [200, headers, File.binread(file)]
         else