code: def test_escape_escape():
      # Escaped escapes (i.e. double backslash)should be treated as literal
      result = render(r"\\[bold]FOO")
      assert str(result) == r"\FOO"
  
      # Single backslash makes the tag literal
      result = render(r"\[bold]FOO")
      assert str(result) == "[bold]FOO"
  
      # Double backslash produces a backslash
      result = render(r"\\[bold]some text[/]")
      assert str(result) == r"\some text"
  
      # Triple backslash parsed as literal backslash plus escaped tag
      result = render(r"\\\[bold]some text\[/]")
      assert str(result) == r"\[bold]some text[/]"
  
      # Backslash escaping only happens when preceding a tag
      result = render(r"\\")
      assert str(result) == r"\\"
  
      result = render(r"\\\\")
      assert str(result) == r"\\\\"
  
imports: import pytest
  from rich.console import Console
  from rich.errors import MarkupError
  from rich.markup import RE_TAGS, Tag, _parse, escape, render
  from rich.text import Span, Text
label_desc: Use image node_id 18 for calling a global function with example usage: test_escape_escape() without return types