diff --git a/examples/main.go b/examples/main.go
new file mode 100644
index 0000000..0a0f574
--- /dev/null
+++ b/examples/main.go
@@ -0,0 +1,25 @@
+package main
+
+import (
+	"os"
+
+	"github.com/subchen/go-log"
+	"github.com/subchen/go-log/formatters"
+)
+
+func main() {
+	log.Info("hello", 123)
+	log.Warn("hello", 123)
+
+	log.Default.Formatter = new(formatters.TextFormatter)
+	log.Infoln("hello", "world")
+	log.Warnln("hello", "world")
+
+	newLog := &log.Logger{
+		Level:     log.INFO,
+		Formatter: new(formatters.JSONFormatter),
+		Out:       os.Stdout,
+	}
+	newLog.Infof("hello %v", 123)
+	newLog.Warnf("hello %v", 123)
+}
diff --git a/formatters/json_formatter.go b/formatters/json_formatter.go
index d08b9a8..ae05d4e 100644
--- a/formatters/json_formatter.go
+++ b/formatters/json_formatter.go
@@ -41,7 +41,7 @@ func (f JSONFormatter) Format(level log.Level, msg string, logger *log.Logger) [
 	data := make(map[string]interface{}, 8)
 
 	// file, line
-	file, line := FilelineCaller(7)
+	file, line := FilelineCaller(5)
 
 	data["time"] = time.Now().Format(f.TimeFormat)
 	data["level"] = level.String()
diff --git a/formatters/text_formatter.go b/formatters/text_formatter.go
index be05ce2..a332f7c 100644
--- a/formatters/text_formatter.go
+++ b/formatters/text_formatter.go
@@ -83,14 +83,14 @@ func (f TextFormatter) Format(level log.Level, msg string, logger *log.Logger) [
 	buf.Write(f.pid)
 
 	// file, line
-	file, line := FilelineCaller(7)
+	file, line := FilelineCaller(5)
 	buf.WriteByte(' ')
 	buf.WriteString(file)
 	buf.WriteByte(':')
 	buf.WriteString(strconv.Itoa(line))
-	buf.WriteByte('"')
 
 	// msg
+	buf.WriteByte(' ')
 	buf.WriteString(msg)
 
 	// newline
diff --git a/formatters/util_fileline.go b/formatters/util_fileline.go
index 9c9cfbb..9288439 100644
--- a/formatters/util_fileline.go
+++ b/formatters/util_fileline.go
@@ -24,7 +24,7 @@ func FilelineCaller(skip int) (file string, line int) {
 			}
 		}
 
-		if !strings.HasPrefix(file, "log/") {
+		if !strings.HasPrefix(file, "go-log/") {
 			return file, line
 		}
 	}