update cnf/parser/nginx encoder+decoder to read the last line even if no newline '\n' char

internal/cnf/parser/nginx/decoder.go

@@ -32,23 +32,31 @@ func (d *decoder) Decode(v interface{}) error {
 
 	// actual section stack
 	stack := make([]*Line, 0)
+	eof := false
 
 	for {
 		n++
+		if eof {
+			break
+		}
 
 		l := &Line{Type: NONE}
 
 		// 1. read line
 		notrim, err := r.ReadString('\n')
 		if err == io.EOF {
-			break
+			if len(notrim) > 0 {
+				eof = true
+			} else {
+				break
+			}
 		} else if err != nil {
 			return &LineError{n, err}
 		}
 		notrim = strings.Trim(notrim, "\r\n")
 
 		// 2. ignore empty
-		line := strings.Trim(notrim, " \t")
+		line := strings.Trim(notrim, " \t\r\n")
 		if len(line) < 1 {
 			continue
 		}

internal/cnf/parser/nginx/encoder.go

@@ -7,22 +7,31 @@ import (
 
 var (
 	defaultPrefix = ""
-	defaultIndent = "  "
+	defaultIndent = "\t"
 )
 
 // encoder implements parser.Encoder
 type encoder struct {
 	writer io.Writer
-	prefix string
+	prefix []byte
-	indent string
+	indent []byte
 }
 
 func (e *encoder) SetIndent(prefix, indent string) {
-	e.prefix = prefix
+	e.prefix = make([]byte, 0)
-	e.indent = indent
+	e.prefix = append(e.prefix, []byte(prefix)...)
+
+	e.indent = make([]byte, 0)
+	e.indent = append(e.indent, []byte(indent)...)
 }
 
 func (e *encoder) Encode(v interface{}) error {
+
+	// default indentation
+	if e.prefix == nil || e.indent == nil {
+		e.SetIndent(defaultPrefix, defaultIndent)
+	}
+
 	// check 'v'
 	vcast, ok := v.(*Line)
 	if !ok {
@@ -78,7 +87,7 @@ func (e *encoder) Encode(v interface{}) error {
 
 			// 4.assignments
 		} else if line.Type == ASSIGNMENT {
-			repr = append(repr, []byte(fmt.Sprintf("%s %s;\n", line.Components[0], line.Components[1]))...)
+			repr = append(repr, []byte(fmt.Sprintf("%s\t\t%s;\n", line.Components[0], line.Components[1]))...)
 
 			// 5. include
 		} else if line.Type == INCLUDE {