update and test query whitespace stripping

util.go

@@ -1,11 +1,17 @@
 package sqlmock
 
-import "strings"
+import (
+	"regexp"
+	"strings"
+)
+
+var re *regexp.Regexp
+
+func init() {
+	re = regexp.MustCompile("\\s+")
+}
 
 // strip out new lines and trim spaces
 func stripQuery(q string) (s string) {
-	s = strings.Replace(q, "\n", " ", -1)
-	s = strings.Replace(s, "\r", "", -1)
-	s = strings.TrimSpace(s)
-	return
+	return strings.TrimSpace(re.ReplaceAllString(q, " "))
 }