Go to the first, previous, next, last section, table of contents.
Usage: (string->c-name! str)
Change all the graphic characters that are invalid in a C name token
into underscores. Whitespace characters are ignored. Any other
character type (i.e. non-graphic and non-white) will cause a failure.
Arguments:
str - input/output string
Go to the first, previous, next, last section, table of contents.