Janitorial issues: Man-getpage-in-background

[Kai Großjohann]

The function Man-getpage-in-background uses two different ways to set
environment variables:

(a) (let ((process-environment (copy-sequence process-environment)))
      (setenv "FOO" "bar")
      ...)

(b) (let ((process-environment (cons "FOO=bar" process-environment)))
      ...)

It looks really strange to see them both in the same function...

Okay to unify?  (I'd choose (a) unless there are objections.)
-- 
A preposition is not a good thing to end a sentence with.