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Fix mutable string syntax #6071

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merged 1 commit into from Apr 26, 2019
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2 changes: 1 addition & 1 deletion Library/Homebrew/utils/github.rb
Expand Up @@ -47,7 +47,7 @@ def pretty_ratelimit_reset(reset)
class AuthenticationFailedError < Error
def initialize(github_message)
@github_message = github_message
message += "GitHub #{github_message}:"
message = +"GitHub #{github_message}:"
if ENV["HOMEBREW_GITHUB_API_TOKEN"]
message << <<~EOS
HOMEBREW_GITHUB_API_TOKEN may be invalid or expired; check:
Expand Down