Increase code coverage

lib/rubocop/cop/layout/closing_heredoc_indentation.rb

@@ -74,10 +74,6 @@ def opening_indentation(node)
           indent_level(heredoc_opening(node))
         end
 
-        def empty_heredoc?(node)
-          node.loc.heredoc_body.source.empty? || !contents_indentation(node)
-        end
-
         def argument_indentation_correct?(node)
           return unless node.argument? || node.chained?
 
@@ -86,14 +82,6 @@ def argument_indentation_correct?(node)
           ) == closing_indentation(node)
         end
 
-        def contents_indentation(node)
-          source_lines = node.loc.heredoc_body.source.split("\n")
-
-          source_lines.reject(&:empty?).map do |line|
-            indent_level(line)
-          end.min
-        end
-
         def closing_indentation(node)
           indent_level(heredoc_closing(node))
         end

lib/rubocop/cop/style/yoda_condition.rb

@@ -97,11 +97,6 @@ def yoda_compatible_condition?(node)
             !noncommutative_operator?(node)
         end
 
-        def both_literals?(node)
-          lhs, _operator, rhs = *node
-          lhs.literal? && rhs.literal?
-        end
-
         def valid_yoda?(node)
           lhs, _operator, rhs = *node
 

spec/rubocop/cop/lint/implicit_string_concatenation_spec.rb

@@ -14,6 +14,8 @@
       expect_offense(<<-RUBY.strip_indent)
         class A; "abc" "def"; end
                  ^^^^^^^^^^^ Combine "abc" and "def" into a single string literal, rather than using implicit string concatenation.
+        class B; 'ghi' 'jkl'; end
+                 ^^^^^^^^^^^ Combine 'ghi' and 'jkl' into a single string literal, rather than using implicit string concatenation.
       RUBY
     end
   end
@@ -32,7 +34,7 @@ class A; "abc" "def"; end
   context 'when the string literals contain newlines' do
     it 'registers an offense' do
       inspect_source(<<-RUBY.strip_indent)
-        def method; "ab\\nc" "de\\nf"; end
+        def method; "ab\nc" "de\nf"; end
       RUBY
 
       expect(cop.offenses.size).to eq(1)