[GRASS-git] [OSGeo/grass] afb1be: r.contour: fix an error message text (#1014)

[Denis Ovsienko]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: afb1be345b45d0d1b71d3678e29fbbfa2f4bf0a8
      https://github.com/OSGeo/grass/commit/afb1be345b45d0d1b71d3678e29fbbfa2f4bf0a8
  Author: Denis Ovsienko <denis at ovsienko.info>
  Date:   2020-10-10 (Sat, 10 Oct 2020)

  Changed paths:
    M locale/po/grassmods_ar.po
    M locale/po/grassmods_bn.po
    M locale/po/grassmods_cs.po
    M locale/po/grassmods_de.po
    M locale/po/grassmods_el.po
    M locale/po/grassmods_es.po
    M locale/po/grassmods_fi.po
    M locale/po/grassmods_fr.po
    M locale/po/grassmods_hu.po
    M locale/po/grassmods_id_ID.po
    M locale/po/grassmods_it.po
    M locale/po/grassmods_ja.po
    M locale/po/grassmods_ko.po
    M locale/po/grassmods_lv.po
    M locale/po/grassmods_ml.po
    M locale/po/grassmods_pl.po
    M locale/po/grassmods_pt.po
    M locale/po/grassmods_pt_BR.po
    M locale/po/grassmods_ro.po
    M locale/po/grassmods_ru.po
    M locale/po/grassmods_si.po
    M locale/po/grassmods_sl.po
    M locale/po/grassmods_ta.po
    M locale/po/grassmods_th.po
    M locale/po/grassmods_tr.po
    M locale/po/grassmods_uk.po
    M locale/po/grassmods_vi.po
    M locale/po/grassmods_zh.po
    M locale/po/grassmods_zh_CN.po
    M raster/r.contour/main.c

  Log Message:
  -----------
  r.contour: fix an error message text (#1014)

The incorrect message was:
> r.contour input=x output=y
ERROR: Neither <levels> nor <step> option must be specified

At least one of the options must be specified. Exactly one option should
be specified (specifying both is currently the same as specifying
"levels" only). Fix the message to say what was originally intended.