tests: suppress output from write()
Otherwise it is printed and the test fails with tons of output on
Python 3.
Differential Revision: https://phab.mercurial-scm.org/D6918
--- a/tests/test-upgrade-repo.t Sun Sep 29 12:04:43 2019 -0700
+++ b/tests/test-upgrade-repo.t Sun Sep 29 12:19:45 2019 -0700
@@ -390,7 +390,7 @@
>>> random.seed(0) # have a reproducible content
>>> with open("f2", "w") as f:
... for i in range(100000):
- ... f.write("%d\n" % random.randint(1000000000, 9999999999))
+ ... f.write("%d\n" % random.randint(1000000000, 9999999999)) and None
$ hg -q commit -A -m 'add f2'
make sure we have a .d file