Slightly restructure rake helper files

Ref #4282

Rakefile

@@ -7,7 +7,7 @@ require 'yaml'
 $LOAD_PATH.unshift(File.join(File.dirname(__FILE__), *%w[lib]))
 require 'jekyll/version'
 
-Dir.glob('lib/tasks/**.rake').each { |f| import f }
+Dir.glob('rake/**.rake').each { |f| import f }
 
 #############################################################################
 #

rake/analysis.rake

@@ -1,27 +1,9 @@
 #############################################################################
 #
-# Packaging tasks for jekyll-docs
+# Analyze the quality of the Jekyll source code (requires Docker)
 #
 #############################################################################
 
-namespace :docs do
-  desc "Release #{docs_name} v#{version}"
-  task :release => :build do
-    unless `git branch` =~ /^\* master$/
-      puts "You must be on the master branch to release!"
-      exit!
-    end
-    sh "gem push pkg/#{docs_name}-#{version}.gem"
-  end
-
-  desc "Build #{docs_name} v#{version} into pkg/"
-  task :build do
-    mkdir_p "pkg"
-    sh "gem build #{docs_name}.gemspec"
-    sh "mv #{docs_name}-#{version}.gem pkg"
-  end
-end
-
 task :analysis do
   require "jekyll/utils/ansi"
   require "open3"
@@ -57,4 +39,4 @@ task :analysis do
   end
 
   file.close
-end
+end

rake/docs.rake

@@ -0,0 +1,23 @@
+#############################################################################
+#
+# Packaging tasks for jekyll-docs
+#
+#############################################################################
+
+namespace :docs do
+  desc "Release #{docs_name} v#{version}"
+  task :release => :build do
+    unless `git branch` =~ /^\* master$/
+      puts "You must be on the master branch to release!"
+      exit!
+    end
+    sh "gem push pkg/#{docs_name}-#{version}.gem"
+  end
+
+  desc "Build #{docs_name} v#{version} into pkg/"
+  task :build do
+    mkdir_p "pkg"
+    sh "gem build #{docs_name}.gemspec"
+    sh "mv #{docs_name}-#{version}.gem pkg"
+  end
+end