doc: update doc.

ghosind · ghosind · commit 73267f467b0d · 2024-06-26T21:55:20.000+08:00
diff --git a/error.go b/error.go
@@ -3,6 +3,8 @@ package optional
 import "errors"
 
 var (
+	// ErrNilFunction indicates the supplier function is nil.
 	ErrNilFunction = errors.New("nil function")
+	// ErrNoSuchValue indicates the Optional does not contain any value.
 	ErrNoSuchValue = errors.New("no such value")
 )

Original file line number	Diff line number	Diff line change
`@@ -3,6 +3,8 @@ package optional`
`3`	`3`	`import "errors"`
`4`	`4`
`5`	`5`	`var (`
	`6`	`+ // ErrNilFunction indicates the supplier function is nil.`
`6`	`7`	`ErrNilFunction = errors.New("nil function")`
	`8`	`+ // ErrNoSuchValue indicates the Optional does not contain any value.`
`7`	`9`	`ErrNoSuchValue = errors.New("no such value")`
`8`	`10`	`)`