Mention the :#? format specifier

ChayimFriedman2 · ChayimFriedman2 · commit 96a17ef323e6 · 2024-01-10T19:53:10.000+02:00
diff --git a/src/language/strings.md b/src/language/strings.md
@@ -186,6 +186,8 @@ println!("{person:?}");
 
 > Note: Using the :? format specifier will use the `Debug` trait to print the
 > struct, where leaving it out will use the `Display` trait.
+>
+> You can also use the `:#?` specifier to pretty-print the debug format.
 
 See also:
 
