Modify user guide so code samples can reference external crates.

bobhy · bobhy · commit 3eb20b367d9b · 2024-12-09T23:05:51.000-05:00
diff --git a/guide/book.toml b/guide/book.toml
@@ -6,6 +6,7 @@ language = "en"
 
 [rust]
 edition = "2018"
+package-dir = "../"
 
 [output.html]
 smart-punctuation = true
