<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def pre_process_code_block(block):
 """Preprocess the content of a code block, modifying the code block in place. Just dedents indented code. """

        if 'indent' in block and block['indent']:
            indent = r'^' + block['indent']
            block['content'] = re.sub(indent, '', block['icontent'],
                                      flags=re.MULTILINE)