fix panic with " as the value

Author: alexquick

godotenv.go

@@ -228,8 +228,8 @@ func parseValue(value string) string {
 	// trim
 	value = strings.Trim(value, " ")
 
-	// check if we've got quoted values
-	if value != "" {
+	// check if we've got quoted values or possible escapes
+	if len(value) > 1 {
 		first := string(value[0:1])
 		last := string(value[len(value)-1:])
 		if first == last && strings.ContainsAny(first, `"'`) {

godotenv_test.go

@@ -252,6 +252,10 @@ func TestParsing(t *testing.T) {
 	parseAndCompare(t, `FOO="bar\\\n\ b\az"`, "FOO", "bar\\\n baz")
 	parseAndCompare(t, `FOO="bar\\r\ b\az"`, "FOO", "bar\\r baz")
 
+	parseAndCompare(t, `="value"`, "", "value")
+	parseAndCompare(t, `KEY="`, "KEY", "\"")
+	parseAndCompare(t, `KEY="value`, "KEY", "\"value")
+
 	// it 'throws an error if line format is incorrect' do
 	// expect{env('lol$wut')}.to raise_error(Dotenv::FormatError)
 	badlyFormattedLine := "lol$wut"