contract C {
    /// @inheritdoc
    function f() internal {
    }
    /// @inheritdoc .
    function f() internal {
    }
    /// @inheritdoc C..f
    function f() internal {
    }
    /// @inheritdoc C.
    function f() internal {
    }
}
// ----
// DocstringParsingError 1933: (17-32='/// @inheritdoc'): Expected contract name following documentation tag @inheritdoc.
// DocstringParsingError 5967: (71-88='/// @inheritdoc .'): Documentation tag @inheritdoc reference "." is malformed.
// DocstringParsingError 5967: (127-147='/// @inheritdoc C..f'): Documentation tag @inheritdoc reference "C..f" is malformed.
// DocstringParsingError 5967: (186-204='/// @inheritdoc C.'): Documentation tag @inheritdoc reference "C." is malformed.