A manual problem about quoted string

[wu liang]

Sir,
In the chapter 5, there is example as:
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
define(`foo’, `This is macro `foo’.’)
The ‘foo’ in the expansion text is not expanded, since it is a quoted
string, and not a name.
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
However, according to my test, this will cause infinite loop of
printing. I think that each 'foo' will be expanded and whether it is
quoted only affects when it is expanded.
I am using the version 1.4.14.

Best regards,
Wu Liang