Info-search-whitespace-regexpInfo-search-whitespace-regexp is a variable defined in `
info.el'. Its value is
"\\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 `]+'. You can customize this variable.