rubocops/text: use rubocop v1 API

Library/Homebrew/rubocops/text.rb

@@ -10,17 +10,16 @@ module RuboCop
       #
       # @api private
       class Text < FormulaCop
-        def audit_formula(node, _class_node, _parent_class_node, body_node)
-          @full_source_content = source_buffer(node).source
+        extend AutoCorrector
 
-          if match = @full_source_content.match(/^require ['"]formula['"]$/)
-            @offensive_node = node
-            @source_buf = source_buffer(node)
-            @line_no = match.pre_match.count("\n") + 1
-            @column = 0
-            @length = match[0].length
-            @offense_source_range = source_range(@source_buf, @line_no, @column, @length)
-            problem "`#{match}` is now unnecessary"
+        def audit_formula(node, _class_node, _parent_class_node, body_node)
+          full_source_content = source_buffer(node).source
+
+          if match = full_source_content.match(/^require ['"]formula['"]$/)
+            range = source_range(source_buffer(node), match.pre_match.count("\n") + 1, 0, match[0].length)
+            add_offense(range, message: "`#{match}` is now unnecessary") do |corrector|
+              corrector.remove(range_with_surrounding_space(range: range))
+            end
           end
 
           if !find_node_method_by_name(body_node, :plist_options) &&

Library/Homebrew/test/rubocops/text_spec.rb

@@ -16,6 +16,13 @@ describe RuboCop::Cop::FormulaAudit::Text do
           homepage "https://brew.sh"
         end
       RUBY
+
+      expect_correction(<<~RUBY)
+        class Foo < Formula
+          url "https://brew.sh/foo-1.0.tgz"
+          homepage "https://brew.sh"
+        end
+      RUBY
     end
 
     it "with both openssl and libressl optional dependencies" do