minor change in test driver

t/call-5001.err

@@ -15,7 +15,7 @@ while(i < 20) {
 
 ---
 
-if  ##ERROR: syntax error - no conditional expression after if
+if  ##ERROR: syntax error - no conditional expression after 'if'
 
 ---
 

t/err.sh

@@ -27,14 +27,19 @@ run_partfile() {
 		return 1
 	}
 
-	l_expected_errline=$(echo $l_expected_errinfo | cut -d: -f1)
-	l_xlen=$(echo $l_expected_errline | wc -c)
+	l_expected_errline=$(echo "$l_expected_errinfo" | cut -d: -f1)
+	l_xlen=$(echo "$l_expected_errline" | wc -c)
 	l_xlen=$(expr $l_xlen + 10)
-	l_expected_errmsg=$(echo $l_expected_errinfo | cut -c${l_xlen}-)
+	l_expected_errmsg=$(echo "$l_expected_errinfo" | cut -c${l_xlen}-)
 	l_output=`$l_cmd 2>&1`
-	## the regular expression is not escaped properly. the error information must not
-	## include specifial regex characters to avoid problems.
-	echo "$l_output" | grep -E "ERROR:.+${l_partfile}\[${l_expected_errline},[[:digit:]]+\] ${l_expected_errmsg}" >/dev/null 2>&1 || {
+
+	## the checks using grep may not be 100% accurate depending on message patterns.
+	## but it's unlikely such a case really happens
+	echo "$l_output" | grep -q -E "^ERROR:.+${l_partfile}\[${l_expected_errline},[[:digit:]]+\] .+" 2>&1 || {
+		echo "ERROR: error not raised at line $l_expected_errline - $l_script($l_partno) - $l_output"
+		return 1
+	}
+	echo "$l_output" | grep -q -F " ${l_expected_errmsg}" 2>&1 || {
 		echo "ERROR: error not raised at line $l_expected_errline - $l_script($l_partno) - $l_output"
 		return 1
 	}

t/var-5001.err

@@ -49,5 +49,5 @@ class A [ a + ] { ##ERROR: syntax error - prohibited binary operator - +
 
 ## TODO: This check is supposed to fail. + must be treated as a binop symbol
 ##---
-##class A [ + ] { ##ERROR: syntax error - prohibited binary operator - +
+##class A [ + ] { ##   ERROR: syntax error - prohibited binary operator - +
 ##}