Use SimpleCov::SourceFile#methods instead of #total_methods

Also fix RuboCop offenses, add method coverage test, and update
SimpleCov dependency to latest.

Author: sferik

.rubocop.yml

@@ -23,6 +23,7 @@ Metrics/BlockNesting:
   Max: 2
 
 Metrics/ClassLength:
+  Max: 110
   CountAsOne:
     - array
     - hash

Gemfile.lock

@@ -1,10 +1,10 @@
 GIT
   remote: https://github.com/simplecov-ruby/simplecov
-  revision: 6bc01182d366be51cbe3a590bede1bd41ac71db8
+  revision: 3d8d723874ff14b06f30dee5d1453f9acc92fdf9
   specs:
     simplecov (0.22.0)
       docile (~> 1.1)
-      simplecov-html (~> 0.11)
+      simplecov-html (~> 0.12)
       simplecov_json_formatter (~> 0.1)
 
 PATH

lib/simplecov-html.rb

@@ -160,7 +160,7 @@ def link_to_source_file(source_file)
 
       def render_stats(result, criterion)
         stats = result.coverage_statistics.fetch(criterion)
-        sprintf("%d / %d (%.2f%%)", stats.covered, stats.total, stats.percent)
+        Kernel.format("%<covered>d / %<total>d (%<percent>.2f%%)", covered: stats.covered, total: stats.total, percent: stats.percent)
       end
     end
   end

test/test_simple_cov-html.rb

@@ -42,6 +42,15 @@ def test_output
     assert_branch_coverages(html_doc) if RUBY_ENGINE != "jruby"
   end
 
+  def test_output_with_method_coverage
+    return unless SimpleCov.method_coverage_supported?
+
+    SimpleCov.enable_coverage(:method)
+    html_doc = format_results("sample.rb" => CoverageFixtures::SAMPLE_RB)
+
+    assert html_doc.at_css("div#AllFiles div.t-method-summary")
+  end
+
   def test_output_without_branch_coverage
     SimpleCov.clear_coverage_criteria
     html_doc = format_results("sample.rb" => CoverageFixtures::SAMPLE_RB)