diff --git a/Library/Homebrew/dev-cmd/contributions.rb b/Library/Homebrew/dev-cmd/contributions.rb
index e035f27081..9a7960e117 100755
--- a/Library/Homebrew/dev-cmd/contributions.rb
+++ b/Library/Homebrew/dev-cmd/contributions.rb
@@ -54,9 +54,9 @@ module Homebrew
       coauthorships += git_log_coauthor_cmd(T.must(repo_path), args)
     end
 
-    sentence = "Person #{args.named.first} directly authored #{commits} commits"
-    sentence += " and co-authored #{coauthorships} commits"
-    sentence += " to #{args[:repos].join(", ")}"
+    sentence = "Person #{args.named.first} directly authored #{commits} commits" \
+               " and co-authored #{coauthorships} commits" \
+               " to #{args[:repos].join(", ")}"
     sentence += if args[:from] && args[:to]
       " between #{args[:from]} and #{args[:to]}"
     elsif args[:from]