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-rw-r--r--lib/set.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/set.rb b/lib/set.rb
index a85dbb1762..2536e05acc 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -64,7 +64,8 @@
#
# ## What's Here
#
-# First, what's elsewhere. \Set includes the module Enumerable,
+# First, what's elsewhere. \Set includes the module
+# {Enumerable}[https://docs.ruby-lang.org/en/master/Enumerable.html],
# which provides dozens of additional methods.
#
# In particular, class \Set does not have many methods of its own