:doc and :more-doc text
Major Section: MISCELLANEOUS
NOTE: The :docs command only makes sense at the terminal.
Example: :Docs "compile" will find all documented topics mentioning the string "compile"
When the :docs command is given a stringp argument it searches the
text produced by :doc and :more-doc and lists all the documented
topics whose text contains the given string. For purposes of this
string matching we ignore distinctions of case and the amount and
kind (but not presence) of white space. We also treat hyphen as
whitespace.