[Rd] Documentation of par, 'xaxs', (PR#10975)

[dgrove at scharp.org]

Full_Name: Doug Grove
Version: 2.7.0-dev (Feb 28)
OS: Linux
Submission from: (NULL) (140.107.164.65)


In the par() help page, for component 'xaxs' it says:

  "Style '"r"' (regular) first extends
   the data range by 4 percent and then ..."


Not quite correct, should say that the data range is extended by 4% IN EACH
DIRECTION. So total extension is 8%.

Not high priority but thought I'd pass it along.

Doug