[GRASS-git] [OSGeo/grass] 767c06: Update g.manual.html (#207)

[積丹尼 Dan Jacobson]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: 767c061944152a33893a681f8413454c5624411f
      https://github.com/OSGeo/grass/commit/767c061944152a33893a681f8413454c5624411f
  Author: 積丹尼 Dan Jacobson <jidanni at jidanni.org>
  Date:   2019-11-25 (Mon, 25 Nov 2019)

  Changed paths:
    M scripts/g.manual/g.manual.html

  Log Message:
  -----------
  Update g.manual.html (#207)

Add missing "s" for proper grammar.
https://trac.osgeo.org/grass/ticket/3976#comment:1