style: latest rubocop fixes

Author: flavorjones

rakelib/cext-depend.rake

@@ -14,7 +14,7 @@ namespace "cext" do
         sh "makedepend -f depend -Y -I. *.c 2> /dev/null"
         dep = File.read("depend")
         dep.gsub!(%r{ \./}, " $(srcdir)/")
-        File.open("depend", "w") { |f| f.write(dep) }
+        File.write("depend", dep)
       end
     end
   end

rakelib/set-version-to-timestamp.rake

@@ -18,7 +18,7 @@ task "set-version-to-timestamp" do
     raise("Could not hack the VERSION constant")
   end
 
-  File.open(version_file_path, "w") { |f| f.write(version_file_contents) }
+  File.write(version_file_path, version_file_contents)
 
   puts "NOTE: wrote version as \"#{fake_version}\""
 end

test/test_memory_leak.rb

@@ -33,7 +33,7 @@ def setup
   #
   if ENV["NOKOGIRI_GC"] # turning these off by default for now
     def test_dont_hurt_em_why
-      content = File.open("#{File.dirname(__FILE__)}/files/dont_hurt_em_why.xml").read
+      content = File.read("#{File.dirname(__FILE__)}/files/dont_hurt_em_why.xml")
       ndoc = Nokogiri::XML(content)
       2.times do
         ndoc.search("status text").first.inner_text