keep unescape script node when child

Author: hogrammer

lib/syntax_tree/haml/format.rb

@@ -16,7 +16,7 @@ def initialize(
             .lines
             .each
             .with_index(1) do |line, index|
-              @literal_lines[index] = line.rstrip if line.start_with?("!")
+              @literal_lines[index] = line.strip if line.lstrip.start_with?("!")
             end
 
           super(source, *rest, options: options)

test/script_test.rb

@@ -22,4 +22,11 @@ def test_preserve_escape_html
   def test_unescape
     assert_format("!= hello")
   end
+
+  def test_child_unescape
+    assert_format(<<~HAML)
+      .container
+        != hello
+    HAML
+  end
 end