use older if let syntax

QuietMisdreavus · Kyle-Ye · commit 36b71b380ca9 · 2023-03-14T10:13:49.000+08:00
rdar://106666684
diff --git a/Sources/Markdown/Inline Nodes/Inline Containers/Link.swift b/Sources/Markdown/Inline Nodes/Inline Containers/Link.swift
@@ -64,7 +64,7 @@ public extension Link {
     }
 
     var isAutolink: Bool {
-        guard let destination,
+        guard let destination = destination,
               childCount == 1,
               let text = child(at: 0) as? Text,
               destination == text.string else {

Original file line number	Diff line number	Diff line change
`@@ -64,7 +64,7 @@ public extension Link {`
`64`	`64`	`}`
`65`	`65`
`66`	`66`	`var isAutolink: Bool {`
`67`		`- guard let destination,`
	`67`	`+ guard let destination = destination,`
`68`	`68`	`childCount == 1,`
`69`	`69`	`let text = child(at: 0) as? Text,`
`70`	`70`	`destination == text.string else {`