# Buggy code
def _check_signature_and_format(self, signature_or_text, parameter=None):
    """
    LSP hints might provide docstrings instead of signatures.

    This method will check for multiple signatures (dict, type etc...) and
    format the text accordingly.
    """
    open_func_char = ""
    has_signature = False
    has_multisignature = False
    language = getattr(self, "language", "").lower()
    signature_or_text = signature_or_text.replace("\\*", "*")
    lines = signature_or_text.split("\n")
    inspect_word = None

    if language == "python":
        open_func_char = "("
        idx = signature_or_text.find(open_func_char)
        inspect_word = signature_or_text[:idx]
        name_plus_char = inspect_word + open_func_char

        # Signature type
        count = signature_or_text.count(name_plus_char)
        has_signature = open_func_char in lines[0]
        if len(lines) > 1:
            has_multisignature = count > 1 and name_plus_char in lines[1]
        else:
            has_multisignature = False

    if has_signature and not has_multisignature:
        for i, line in enumerate(lines):
            if line.strip() == "":
                break

        if i == 0:
            signature = lines[0]
            extra_text = None
        else:
            signature = "\n".join(lines[:i])
            extra_text = "\n".join(lines[i:])

        if signature:
            new_signature = self._format_signature(
                signatures=signature,
                parameter=parameter,
            )
    elif has_multisignature:
        signature = signature_or_text.replace(name_plus_char, "<br>" + name_plus_char)
        signature = signature[4:]  # Remove the first line break
        signature = signature.replace("\n", " ")
        signature = signature.replace(r"\\*", "*")
        signature = signature.replace(r"\*", "*")
        signature = signature.replace("<br>", "\n")
        signatures = signature.split("\n")
        signatures = [sig for sig in signatures if sig]  # Remove empty

        new_signature = self._format_signature(
            signatures=signatures,
            parameter=parameter,
        )
        extra_text = None
    else:
        new_signature = None
        extra_text = signature_or_text

    return new_signature, extra_text, inspect_word


# Traceback (IndexError)
documentation=documentation,
res = self._check_signature_and_format(signature, parameter)
parameter=parameter,
parameter=parameter,
IndexError: tuple index out of range

Traceback (most recent call last):
msg = self.format(record)
return fmt.format(record)
record.message = record.getMessage()
msg = msg % self.args
ValueError: incomplete format
Call stack:
sys.exit(main())
mainwindow.main()
mainwindow = run_spyder(app, options, args)
app.exec_()
handler(resp['result'], req_id)
{'params': response})
handler(params)
self.log_lsp_handle_errors("Error when processing signature")
logger.error('%', 1, stack_info=True)
Arguments: (1,)

# Fixed code
def _check_signature_and_format(self, signature_or_text, parameter=None):
    """
    LSP hints might provide docstrings instead of signatures.

    This method will check for multiple signatures (dict, type etc...) and
    format the text accordingly.
    """
    open_func_char = ""
    has_signature = False
    has_multisignature = False
    language = getattr(self, "language", "").lower()
    signature_or_text = signature_or_text.replace("\\*", "*")

    # Remove special symbols that could itefere with ''.format
    signature_or_text = signature_or_text.replace("{", "&#123;")
    signature_or_text = signature_or_text.replace("}", "&#125;")

    lines = signature_or_text.split("\n")
    inspect_word = None

    if language == "python":
        open_func_char = "("
        idx = signature_or_text.find(open_func_char)
        inspect_word = signature_or_text[:idx]
        name_plus_char = inspect_word + open_func_char

        # Signature type
        count = signature_or_text.count(name_plus_char)
        has_signature = open_func_char in lines[0]
        if len(lines) > 1:
            has_multisignature = count > 1 and name_plus_char in lines[1]
        else:
            has_multisignature = False

    if has_signature and not has_multisignature:
        for i, line in enumerate(lines):
            if line.strip() == "":
                break

        if i == 0:
            signature = lines[0]
            extra_text = None
        else:
            signature = "\n".join(lines[:i])
            extra_text = "\n".join(lines[i:])

        if signature:
            new_signature = self._format_signature(
                signatures=signature,
                parameter=parameter,
            )
    elif has_multisignature:
        signature = signature_or_text.replace(name_plus_char, "<br>" + name_plus_char)
        signature = signature[4:]  # Remove the first line break
        signature = signature.replace("\n", " ")
        signature = signature.replace(r"\\*", "*")
        signature = signature.replace(r"\*", "*")
        signature = signature.replace("<br>", "\n")
        signatures = signature.split("\n")
        signatures = [sig for sig in signatures if sig]  # Remove empty

        new_signature = self._format_signature(
            signatures=signatures,
            parameter=parameter,
        )
        extra_text = None
    else:
        new_signature = None
        extra_text = signature_or_text

    return new_signature, extra_text, inspect_word