gnuplot: use assert_predicate

Homebrew · Oct 9, 2017 · 0c693b8 · 0c693b8
1 parent 51f1df7
commit 0c693b8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Formula/gnuplot.rb b/Formula/gnuplot.rb
@@ -114,6 +114,6 @@ def caveats
       set output "#{testpath}/graph.txt";
       plot sin(x);
     EOS
-    File.exist? testpath/"graph.txt"
+    assert_predicate testpath/"graph.txt", :exist?
   end
 end