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-rw-r--r--Library/Formula/cpmtools.rb3
1 files changed, 1 insertions, 2 deletions
diff --git a/Library/Formula/cpmtools.rb b/Library/Formula/cpmtools.rb
index 5864ded8c..c584a0a4f 100644
--- a/Library/Formula/cpmtools.rb
+++ b/Library/Formula/cpmtools.rb
@@ -26,8 +26,7 @@ class Cpmtools < Formula
system "#{bin}/cpmcp -f ibm-3740 #{image} #{src} 0:foo"
# check for the file in the cp/m directory
- assert `#{bin}/cpmls -f ibm-3740 #{image}`.include?("foo")
- assert_equal 0, $?.exitstatus
+ assert shell_output("#{bin}/cpmls -f ibm-3740 #{image}").include?("foo")
# copy the file back out of the image
dest = testpath/"bar"