add tests for man+'man[1-8]'

Library/Homebrew/rubocops/lines_cop.rb

@@ -93,12 +93,12 @@ module RuboCop
               problem "Use build instead of ARGV to check options"
             end
           end
-          #
-          # find_instance_method_call(body_node, :man, :+) do |m|
-          #   next unless match = regex_match_group(parameters(m).first, %r{man[1-8]})
-          #   problem "\"#{m.source}\" should be \"#{match[1]}\""
-          # end
-          #
+
+          find_instance_method_call(body_node, :man, :+) do |m|
+            next unless match = regex_match_group(parameters(m).first, %r{man[1-8]})
+            problem "\"#{m.source}\" should be \"#{match[0]}\""
+          end
+
           # # Avoid hard-coding compilers
           # find_every_method_call_by_name(body_node, :system).each do |m|
           #   param = parameters(m).first

Library/Homebrew/test/rubocops/lines_cop_spec.rb

@@ -835,6 +835,30 @@ describe RuboCop::Cop::FormulaAudit::Miscellaneous do
         expect_offense(expected, actual)
       end
     end
+
+    it "with man+ " do
+      source = <<-EOS.undent
+        class Foo < Formula
+          desc "foo"
+          url 'http://example.com/foo-1.0.tgz'
+          def test
+            man1.install man+"man8" => "faad.1"
+          end
+        end
+      EOS
+
+      expected_offenses = [{  message: "\"man+\"man8\"\" should be \"man8\"",
+                              severity: :convention,
+                              line: 5,
+                              column: 22,
+                              source: source }]
+
+      inspect_source(cop, source)
+
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
   end
   def expect_offense(expected, actual)
     expect(actual.message).to eq(expected[:message])