Pipe read test: Replace "echo" with "printf"

This test was failing on GuixSD

diff --git a/tests/data/file.at b/tests/data/file.at
index 4efea3a2cfa94e00655aaa1d657e8f0d5a8358e6..bccdf003c5af250136e2abc4f387769814c8f870 100644 (file)
--- a/tests/data/file.at
+++ b/tests/data/file.at
@@ -91,7 +91,7 @@ AT_CLEANUP
 AT_SETUP([Reading from pipe])
 
 AT_DATA([pipe.sps], [dnl
-data list file='echo "1 2\n 3 4\n 5 6" |' notable list /x * y *.
+data list file='printf "1 2\n 3 4\n 5 6\n" |' notable list /x * y *.
 list.
 ])