1) The current man page lists a "-w size" flag to set the window size
ex [-FRrSsv] [-c cmd] [-t tag] [-w size] [file ...]
vi [-eFRrS] [-c cmd] [-t tag] [-w size] [file ...]
view [-eFrS] [-c cmd] [-t tag] [-w size] [file ...]
However attempting to invoke ex/vi/view with "-w $SIZE" gives an error message:
$ vi -w 10 a.txt b.txt
set: no 23 option: 'set all' gives all option values
(same with invoking as ex or view) As best I can tell, either the "-w" option doesn't work, has side-effects, or is improperly documented. I suspect that the solution is to just remove the references to the "-w size" option.
2) Under the ASYNCHRONOUS EVENTS section's SIGWINCH, the reader is referred to the "vi/ex reference manual section Sizing the Screen" but AFAICT, either there is no vi/ex reference manual (if it's referring to an external document) or if that document is the self-same man-page, there is no "Sizing the Screen" section. I'm not sure whether the proper resolution is to add a Sizing the Screen section to the current man-page, or to remove that cross-reference. Or, if it is an external document, providing details on the file-path to the "reference manual".