[Fix rubocop#10939] Fix an error for Style/Next

Fixes rubocop#10939.

This PR fixes an error for `Style/Next` when line break before condition.
The removed indentation logic can be delegated to `Layout/IndentationConsistency`.

changelog/fix_an_error_for_style_next.md

@@ -0,0 +1 @@
+* [#10939](https://github.com/rubocop/rubocop/issues/10939): Fix an error for `Style/Next` when line break before condition. ([@koic][])

lib/rubocop/cop/style/next.rb

@@ -225,11 +225,7 @@ def reindent_line(corrector, lineno, delta, buffer)
           adjustment = delta + @reindented_lines[lineno]
           @reindented_lines[lineno] = adjustment
 
-          if adjustment.positive?
-            corrector.remove_leading(buffer.line_range(lineno), adjustment)
-          elsif adjustment.negative?
-            corrector.insert_before(buffer.line_range(lineno), ' ' * -adjustment)
-          end
+          corrector.remove_leading(buffer.line_range(lineno), adjustment) if adjustment.positive?
         end
       end
     end

spec/rubocop/cop/style/next_spec.rb

@@ -315,6 +315,27 @@
       RUBY
     end
 
+    it 'registers an offense when line break before condition' do
+      expect_offense(<<~RUBY)
+        array.each do |item|
+          if
+          ^^ Use `next` to skip iteration.
+             condition
+            next if item.zero?
+            do_something
+          end
+        end
+      RUBY
+
+      expect_correction(<<~RUBY)
+        array.each do |item|
+          next unless condition
+            next if item.zero?
+            do_something
+        end
+      RUBY
+    end
+
     it 'allows loops with conditional break' do
       expect_no_offenses(<<~RUBY)
         loop do