A few more standardrb corrections

Author: jakeonfire

lib/cc/engine/category_parser.rb

@@ -24,7 +24,7 @@ def category
         "Rails/HasAndBelongsToMany" => "Style",
         "Rails/TimeZone" => "Style",
         "Rails/Validation" => "Style",
-        "Standard/SemanticBlocks" => "Style",
+        "Standard/SemanticBlocks" => "Style"
       }.freeze
 
       attr_reader :cop_name

lib/tasks/docs.rake

@@ -31,23 +31,23 @@ namespace :docs do
 
   def collect_standard_files
     `git clone https://github.com/testdouble/standard`
-    FileUtils.cd('standard') do
+    FileUtils.cd("standard") do
       `git checkout tags/v#{Standard::VERSION.version}`
     end
     Dir.glob("./standard/lib/standard/cop/**.rb")
   end
 
   def collect_rubocop_files
     `git clone https://github.com/rubocop-hq/rubocop`
-    FileUtils.cd('rubocop') do
+    FileUtils.cd("rubocop") do
       `git checkout tags/v#{RuboCop::Version.version}`
     end
     Dir.glob("./rubocop/lib/rubocop/cop/{#{COP_FOLDERS.join(",")}}/**.rb")
   end
 
   def collect_rubocop_performance_files
     `git clone https://github.com/rubocop-hq/rubocop-performance`
-    FileUtils.cd('rubocop-performance') do
+    FileUtils.cd("rubocop-performance") do
       `git checkout tags/v#{RuboCop::Performance::Version::STRING}`
     end
     Dir.glob("./rubocop-performance/lib/rubocop/cop/performance/**.rb")