[Midnightbsd-cvs] src: expr.1: fix some spelling errors.

[laffer1 at midnightbsd.org]

Log Message:
-----------
fix some spelling errors.

Modified Files:
--------------
    src/bin/expr:
        expr.1 (r1.3 -> r1.4)
        (http://cvsweb.midnightbsd.org/src/bin/expr/expr.1?r1=1.3&r2=1.4)