Define path with __dir__ (#161)

Merge pull request 161

Author: DirtyF

jekyll-redirect-from.gemspec

@@ -1,6 +1,6 @@
 # coding: utf-8
 
-lib = File.expand_path("../lib", __FILE__)
+lib = File.expand_path("lib", __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require "jekyll-redirect-from/version"
 

lib/jekyll-redirect-from/layout.rb

@@ -4,7 +4,7 @@ module JekyllRedirectFrom
   class Layout < Jekyll::Layout
     def initialize(site)
       @site = site
-      @base = File.dirname(__FILE__)
+      @base = __dir__
       @name = "redirect.html"
       @path = File.expand_path(@name, @base)
       @relative_path = "_layouts/redirect.html"

spec/jekyll_redirect_from/layout_spec.rb

@@ -10,7 +10,7 @@
   end
 
   it "exposes the path" do
-    expected = File.expand_path "../../lib/jekyll-redirect-from/redirect.html", File.dirname(__FILE__)
+    expected = File.expand_path "../../lib/jekyll-redirect-from/redirect.html", __dir__
     expect(subject.path).to eql(expected)
   end
 

spec/spec_helper.rb

@@ -20,7 +20,7 @@
   end
 
   def fixtures_path
-    Pathname.new(__FILE__).parent.join("fixtures")
+    Pathname.new(__dir__).join("fixtures")
   end
 
   def dest_path