Returns a .po file with a simple plural formula.
function getPoFileWithSimplePlural() {
return <<<EOF
msgid ""
msgstr ""
"Project-Id-Version: Drupal 7\\n"
"MIME-Version: 1.0\\n"
"Content-Type: text/plain; charset=UTF-8\\n"
"Content-Transfer-Encoding: 8bit\\n"
"Plural-Forms: nplurals=2; plural=(n!=1);\\n"
msgid "One sheep"
msgid_plural "@count sheep"
msgstr[0] "un mouton"
msgstr[1] "@count moutons"
msgid "Monday"
msgstr "lundi"
EOF;
}