updated nighly build doc.

doc/internal/metadocumentation.txt

@@ -105,9 +105,9 @@ The nightly build process.
 
 The user lisa have a cronjob on the computer boltzmann. The cronjob execute the script ~/nightly_build/do_nightly_build_theano. This script make a an "hg pull -u" of theano and pylearn. Then it execute 
 
->>> HEANO_DEFAULT_MODE=DEBUG_MODE /usr/bin/nosetests --with-coverage --cover-package=theano --cover-package=pylearn
+>>> THEANO_UNITTEST_SEED=3 THEANO_DEFAULT_MODE=DEBUG_MODE /usr/bin/nosetests --with-coverage --cover-package=theano --cover-package=pylearn
 
-in the repository. The output is email to one of the developper.
+in the repository. The output is email to one of the developper. We exeute it with many different seed.
 
 We can't email directly to the mailing list as it is emailed as the root user. We didn't found a way to have google groups accept email from a user without sending an email to it. As we don't have root control from this domain, we won't receive the email.