Fix blank line indentation for unless statements

Previously, the cop was only tracking indentation deltas for 'if'
statements but not 'unless' statements, even though both are parsed
as :if nodes. This caused blank lines inside unless blocks to be
incorrectly flagged or 'corrected' to the wrong indentation level.

The fix includes 'unless' statements in the condition that creates
indentation deltas, ensuring blank lines inside unless blocks are
properly indented to match their context.

Fixes issue where blank lines inside nested unless blocks were
incorrectly rewritten from two tabs to one tab.

Author: ioquatix

lib/rubocop/socketry/layout/consistent_blank_line_indentation.rb

@@ -125,7 +125,7 @@ def walk_ast_for_indentation(node, deltas, parent = nil)
 						end
 					when :if
 						# We don't want to add deltas for elsif, because it's handled by the if node:
-						if node.keyword == "if"
+						if node.keyword == "if" || node.keyword == "unless"
 							if location = node.location
 								deltas[location.line] += 1
 								deltas[location.last_line] -= 1

test/rubocop/socketry/layout/consistent_blank_line_indentation.rb

@@ -683,4 +683,31 @@ def foo
 			expect(offenses).to be(:empty?)
 		end
 	end
+	
+	# This test case specifically demonstrates the issue described by the user
+	with "a blank line inside nested unless block" do
+		let(:source) {"def hello(foo)\n\tunless foo\n\t\tx = 10\n\t\t\n\t\ty = 20\n\tend\nend\n"}
+		
+		it "should properly indent blank line with two tabs inside nested unless block" do
+			processed_source = RuboCop::ProcessedSource.new(source, RUBY_VERSION.to_f)
+			investigator = RuboCop::Cop::Commissioner.new([cop], [], raise_error: true)
+			report = investigator.investigate(processed_source)
+			offenses = report.offenses
+			expect(offenses).to be(:empty?)
+		end
+	end
+	
+	# This test case shows the current incorrect behavior 
+	with "a blank line inside nested unless block with incorrect indentation" do
+		let(:source) {"def hello(foo)\n\tunless foo\n\t\tx = 10\n\t\n\t\ty = 20\n\tend\nend\n"}
+		
+		it "should register an offense when blank line has only one tab instead of two" do
+			processed_source = RuboCop::ProcessedSource.new(source, RUBY_VERSION.to_f)
+			investigator = RuboCop::Cop::Commissioner.new([cop], [], raise_error: true)
+			report = investigator.investigate(processed_source)
+			offenses = report.offenses
+			expect(offenses).not.to be(:empty?)
+			expect(offenses.first.message).to be(:include?, message)
+		end
+	end
 end