https://git.ruby-lang.org/ruby.git/commit/?id=247b06d400

From 247b06d40095e3dfe16b94ea88976e39e83e2463 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Fri, 2 Aug 2019 23:01:54 +0900
Subject: Revert "Give up `brew update` on Travis"

This reverts commit e05f397f08e98fb170e3aca885d6028b344e833c.
Failed... https://travis-ci.org/ruby/ruby/jobs/566961111

We should talk to Travis people instead...

diff --git a/.travis.yml b/.travis.yml
index 7b5a4a3..a0ebd49 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -46,8 +46,7 @@ addons: https://github.com/ruby/ruby/blob/trunk/.travis.yml#L46
       - valgrind
       - zlib1g-dev
   homebrew:
-    # `update: true` is disabled because `brew update` hangs often
-    # update: true
+    update: true
     packages:
       - gdbm
       - gmp
-- 
cgit v0.10.2


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