pstree: fix RuboCop warnings.
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@ -25,7 +25,7 @@ class Pstree < Formula
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test do
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lines = shell_output("#{bin}/pstree #{Process.pid}").strip.split("\n")
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assert_match $0, lines[0]
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assert_match $PROGRAM_NAME, lines[0]
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assert_match "#{bin}/pstree", lines[1]
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end
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end
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