t9001: do not fail only due to CR/LF issues

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

t/t9001-send-email.sh

@@ -23,6 +23,7 @@ test_expect_success $PREREQ \
       echo do
       echo "  echo \"!\$a!\""
       echo "done >commandline\$output"
+      test_have_prereq MINGW && echo "dos2unix commandline\$output"
       echo "cat > msgtxt\$output"
       ) >fake.sendmail &&
      chmod +x ./fake.sendmail &&