Variable: Info-search-whitespace-regexp
Info-search-whitespace-regexp is a customizable variable defined in
info.el.gz.
Value
"\\s-+"
Documentation
If non-nil, regular expression to match a sequence of whitespace chars.
This applies to Info search for regular expressions.
You might want to use something like "[ \\t\\r\\n]+" instead.
In the Customization buffer, that is [ followed by a space,
a tab, a carriage return (control-M), a newline, and ]+. Don't
add any capturing groups into this value; that can change the
numbering of existing capture groups in unexpected ways.
Source Code
;; Defined in /usr/src/emacs/lisp/info.el.gz
(defcustom Info-search-whitespace-regexp "\\s-+"
"If non-nil, regular expression to match a sequence of whitespace chars.
This applies to Info search for regular expressions.
You might want to use something like \"[ \\t\\r\\n]+\" instead.
In the Customization buffer, that is `[' followed by a space,
a tab, a carriage return (control-M), a newline, and `]+'. Don't
add any capturing groups into this value; that can change the
numbering of existing capture groups in unexpected ways."
:type 'regexp)