code: def unesc(line, language):
      """Uncomment once a commented line"""
      comment = _COMMENT[language]
      unindented = line.lstrip()
      indent = line[: len(line) - len(unindented)]
      if unindented.startswith(comment + " "):
          return indent + unindented[len(comment) + 1 :]
      if unindented.startswith(comment):
          return indent + unindented[len(comment) :]
      return line
  
file_path: jupytext/src/jupytext/magics.py
imports: import re
  from .languages import _COMMENT, _SCRIPT_EXTENSIONS, usual_language_name
  from .stringparser import StringParser
label_desc: Use image node_id 5 for calling a global function with example usage: unesc(line, language) and returns: line, unknown, unknown