K 10
svn:author
V 3
0mp
K 8
svn:date
V 27
2020-08-05T15:03:01.887281Z
K 7
svn:log
V 576
Make argument parsing a bit more robust

Currently, when running mfh with a flag like --help the user gets
a confusing error message from expr(1) like the following:

> expr: illegal option -- -
> expr: usage: expr [-e] expression
>
> revision "--help" should be a number

This is not helpful. Instead, make sure that any arguments specified by the
user are handled properly by expr(1). This results in a much cleaner error
message:

> revision "--help" should be a number

Reviewed by:	mat
Approved by:	portmgr (mat)
Differential Revision:	https://reviews.freebsd.org/D25958

END