Merge pull request #203733 from Homebrew/heksa-test

heksa: update test

Formula/h/heksa.rb

@@ -32,17 +32,11 @@ def install
   test do
     require "pty"
 
-    r, _w, pid = PTY.spawn("#{bin}/heksa -l 16 -f asc -o no #{test_fixtures("test.png")}")
-
-    # remove ANSI colors
-    begin
-      output = r.read.gsub(/\e\[([;\d]+)?m/, "")
+    PTY.spawn("#{bin}/heksa -l 16 -f asc -o no #{test_fixtures("test.png")}") do |r, _w, pid|
+      output = r.readline.gsub(/\e\[([;\d]+)?m/, "")
       assert_match(/^.PNG/, output)
-    rescue Errno::EIO
-      # GNU/Linux raises EIO when read is done on closed pty
+    ensure
+      Process.wait pid
     end
-
-    Process.wait(pid)
-    assert_equal 0, $CHILD_STATUS.exitstatus
   end
 end