Set has_rdoc = false in the gemfile.

Why was this still true?

doc-src/HAML_CHANGELOG.md

@@ -8,6 +8,8 @@
 * Don't require `rake` in the gemspec, for bundler compatibility under
   JRuby. Thanks to [Gordon McCreight](http://www.gmccreight.com/blog).
 
+* Get rid of the annoying RDoc errors on install.
+
 ## 3.0.17
 
 [Tagged on GitHub](http://github.com/nex3/haml/commit/3.0.17).

doc-src/SASS_CHANGELOG.md

@@ -14,6 +14,8 @@
 * Fix a bug in `haml_tag` that would allow duplicate attributes to be added
   and make `data-` attributes not work.
 
+* Get rid of the annoying RDoc errors on install.
+
 ## 3.0.17
 
 [Tagged on GitHub](http://github.com/nex3/haml/commit/3.0.17).

haml.gemspec

@@ -30,14 +30,6 @@ HAML_GEMSPEC = Gem::Specification.new do |spec|
     'bin/*', 'test/**/*', 'extra/**/*', 'Rakefile', 'init.rb',
     '.yardopts'] + readmes
   spec.homepage = 'http://haml-lang.com/'
-  spec.has_rdoc = true
-  spec.extra_rdoc_files = readmes
-  spec.rdoc_options += [
-    '--title', 'Haml',
-    '--main', 'README.rdoc',
-    '--exclude', 'lib/haml/buffer.rb',
-    '--line-numbers',
-    '--inline-source'
-   ]
+  spec.has_rdoc = false
   spec.test_files = Dir['test/**/*_test.rb']
 end