Complete: Match any non-empty output in MSR tests
Before this change the two tests would always work successfully,
regardless of the output of the `kdb complete` commands.
@@ -64,11 +64,11 @@ kdb complete user --max-depth=1
# list suggestions for the namespace user, only the next level as it ends with /
# note the difference to the previous example, which uses no trailing /
kdb complete user/ --max-depth=1
-# STDOUT-REGEX: .*
+# STDOUT-REGEX: .+
# list all possible namespaces or mountpoints, only the current level
kdb complete --max-depth=1
-# STDOUT-REGEX: .*
+# STDOUT-REGEX: .+
# list suggestions for /sw/elektra/examples/kdb-complete, only the current level
kdb complete /sw/elektra/examples/kdb-complete --max-depth=1
