Fix linter errors

lib/haml_lint/ruby_extraction/chunk_extractor.rb

@@ -692,7 +692,7 @@ def self.block_keyword(code)
         return keyword
       end
 
-      code.scan(Haml::Parser::BLOCK_KEYWORD_REGEX) do |c|
+      code.scan(Haml::Parser::BLOCK_KEYWORD_REGEX) do |_c|
         # Check that the keyword is actually a keyword, and not
         # an argument to a method.
         next_char = code[Regexp.last_match.offset(0)[1]]
@@ -702,7 +702,7 @@ def self.block_keyword(code)
         return Regexp.last_match[1] || Regexp.last_match[2]
       end
 
-      return nil
+      nil
     end
   end
 end

spec/haml_lint/ruby_extraction/chunk_extractor_spec.rb

@@ -261,25 +261,25 @@ def do_test
       expect(described_class.block_keyword(input_single_line)).to eq(nil)
 
       # Keyword as symbol not first on new line should work
-      input_multiline_1 = <<~HAML
+      input_multiline1 = <<~HAML
         = helper foo: true,
                  bar: true, if: false
       HAML
-      expect(described_class.block_keyword(input_multiline_1)).to eq(nil)
+      expect(described_class.block_keyword(input_multiline1)).to eq(nil)
 
       # Keyword as symbol first on new line should also work
-      input_multiline_2 = <<~HAML
+      input_multiline2 = <<~HAML
         = helper foo: true, bar: true,
                  if: false
       HAML
-      expect(described_class.block_keyword(input_multiline_2)).to eq(nil)
+      expect(described_class.block_keyword(input_multiline2)).to eq(nil)
 
       # Testing with another keyword
-      input_multiline_3 = <<~HAML
+      input_multiline3 = <<~HAML
         = helper foo: true, bar: true,
                  for: User.first
       HAML
-      expect(described_class.block_keyword(input_multiline_3)).to eq(nil)
+      expect(described_class.block_keyword(input_multiline3)).to eq(nil)
     end
   end
 end