[Trad] [gleu/pgdocs_fr] bc8012: stddev == écart type

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/gleu/pgdocs_fr
  Commit: bc80123bd70c064d4d63a84d396a2bcd72367df6
      https://github.com/gleu/pgdocs_fr/commit/bc80123bd70c064d4d63a84d396a2bcd72367df6
  Author: Guillaume Lelarge <guillaume at lelarge.info>
  Date:   2014-12-29 (Mon, 29 Dec 2014)

  Changed paths:
    M postgresql/func.xml

  Log Message:
  -----------
  stddev == écart type

d'après une remarque de Thomas Reiss.