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-rw-r--r--lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb
index 3fad948392..129246bf4a 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb
@@ -26,7 +26,7 @@ module Gem::Resolver::Molinillo
def message
sources = required_by.map { |r| "`#{r}`" }.join(' and ')
message = "Unable to find a specification for `#{dependency}`"
- message << " depended upon by #{sources}" unless sources.empty?
+ message += " depended upon by #{sources}" unless sources.empty?
message
end
end