texinfo-no-refill-regexp

texinfo-no-refill-regexp is a variable defined in `texinfmt.el'.
Its value is

"^@\\(direntry\\|lisp\\|smalllisp\\|example\\|smallexample\\|display\\|smalldisplay\\|format\\|smallformat\\|flushleft\\|flushright\\|menu\\|multitable\\|titlepage\\|iftex\\|ifhtml\\|tex\\|html\\)"

Documentation:
Regexp specifying environments in which paragraphs are not filled.