(%-constructs are allowed when the string is the entire mode-line-format\n\
or when it is found in a cons-cell or a list)\n\
%b -- print buffer name. %f -- print visited file name.\n\
- %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
+ %* -- print *, % or hyphen. %+ -- print * or hyphen.\n\
%s -- print process status. %l -- print the current line number.\n\
%p -- print percent of buffer above top of window, or Top, Bot or All.\n\
%P -- print percent of buffer above bottom of window, perhaps plus Top,\n\