Add dirty flag

editor/document.go

@@ -7,6 +7,7 @@ import (
 )
 
 type document struct {
+	dirty    bool
 	filename string
 	rows     []*row
 }
@@ -15,6 +16,7 @@ func newDocument() *document {
 	var rows []*row
 
 	return &document{
+		false,
 		"",
 		rows,
 	}
@@ -41,7 +43,7 @@ func (d *document) save() int {
 		return 0
 	}
 
-	file, err := os.OpenFile(d.filename, os.O_RDWR | os.O_CREATE, 0644)
+	file, err := os.OpenFile(d.filename, os.O_RDWR|os.O_CREATE, 0644)
 	if err != nil {
 		panic("failed to open/create file for saving")
 	}

editor/editor_test.go

@@ -17,8 +17,8 @@ type moveCursor struct {
 }
 
 var cursorTests = []moveCursor{
-	{[]string{"\x1b"}, false, &point{0,0}},
-	{[]string{keyRight}, true, &point{1,0}},
+	{[]string{"\x1b"}, false, &point{0, 0}},
+	{[]string{keyRight}, true, &point{1, 0}},
 	{[]string{keyEnd}, true, &point{14, 0}},
 	{[]string{keyEnd, keyHome}, true, &point{0, 0}},
 	{[]string{keyRight, keyLeft}, true, &point{0, 0}},