hack/check_error_case.sh: check against Error/Fatal

Author: estroz

hack/check_error_case.sh

@@ -7,7 +7,7 @@ source "hack/lib/test_lib.sh"
 
 echo "Checking case of error messages..."
 allfiles=$(listFiles)
-output=$(grep -Rn 'Fatalf("[[:upper:]]\|Errorf("[[:upper:]]\|errors.New("[[:upper:]]' $allfiles)
+output=$(grep -ERn 'Fatal(f)?\("[[:upper:]]|Error(f)?\("[[:upper:]]|Error\((err|nil), "[[:upper:]]|errors.New\("[[:upper:]]' $allfiles)
 if [ -n "${output}" ]; then
   echo "Error messages in wrong case:"
   echo "${output}"