Fix rubocop offenses on master.

lib/jekyll/entry_filter.rb

@@ -2,7 +2,7 @@ module Jekyll
   class EntryFilter
     attr_reader :site
     SPECIAL_LEADING_CHARACTERS = [
-      ".", "_", '#', "~"
+      ".", "_", "#", "~"
     ].freeze
 
     def initialize(site, base_directory = nil)

test/test_filters.rb

@@ -22,7 +22,7 @@ class TestFilters < JekyllUnitTest
         "destination" => dest_dir,
         "timezone"    => "UTC"
       })
-      @sample_time = Time.utc(2013, 03, 27, 11, 22, 33)
+      @sample_time = Time.utc(2013, 3, 27, 11, 22, 33)
       @sample_date = Date.parse("2013-03-27")
       @time_as_string = "September 11, 2001 12:46:30 -0000"
       @time_as_numeric = 1_399_680_607

test/test_kramdown.rb

@@ -28,7 +28,7 @@ class TestKramdown < JekyllUnitTest
     end
 
     should "run Kramdown" do
-      assert_equal "<h1>Some Header</h1>", @markdown.convert('# Some Header #').strip
+      assert_equal "<h1>Some Header</h1>", @markdown.convert("# Some Header #").strip
     end
 
     context "when asked to convert smart quotes" do

test/test_page.rb

@@ -39,7 +39,7 @@ class TestPage < JekyllUnitTest
       end
 
       should "create url with non-alphabetic characters" do
-        @page = setup_page("+", '%# +.md')
+        @page = setup_page("+", "%# +.md")
         assert_equal "/+/%25%23%20+.html", @page.url
       end
 
@@ -268,12 +268,12 @@ class TestPage < JekyllUnitTest
       end
 
       should "write even when permalink has '%# +'" do
-        page = setup_page("+", '%# +.md')
+        page = setup_page("+", "%# +.md")
         do_render(page)
         page.write(dest_dir)
 
         assert File.directory?(dest_dir)
-        assert_exist dest_dir("+", '%# +.html')
+        assert_exist dest_dir("+", "%# +.html")
       end
 
       should "write properly without html extension" do