Better naming

Author: rodrigogiraoserrao

src/textual/dom.py

@@ -266,11 +266,11 @@ def get_path(base: Type[DOMNode]) -> str:
                 return f"{base.__name__}"
 
         default_css = [base.DEFAULT_CSS.strip() for base in self._node_bases]
-        parent_default_css = default_css[1:] + [""]
-        for tie_breaker, (base, css, next_css) in enumerate(
-            zip(self._node_bases, default_css, parent_default_css)
+        ancestor_default_css = default_css[1:] + [""]
+        for tie_breaker, (base, css, ancestor_css) in enumerate(
+            zip(self._node_bases, default_css, ancestor_default_css)
         ):
-            if css and css != next_css:
+            if css and css != ancestor_css:
                 css_stack.append((get_path(base), css, -tie_breaker))
 
         return css_stack