[GRASS-git] [OSGeo/grass] 2cd24d: r.contour: fix an error message text (#1014)

[Denis Ovsienko]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 2cd24d2659e892ff130c310af1079136fadac737
      https://github.com/OSGeo/grass/commit/2cd24d2659e892ff130c310af1079136fadac737
  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.