avm1: Made AvmString debug actually show contents of the string

core/src/avm1/string.rs

@@ -4,13 +4,22 @@ use std::fmt;
 use std::hash::{Hash, Hasher};
 use std::ops::Deref;
 
-#[derive(Debug, Clone, Copy, Collect)]
+#[derive(Clone, Copy, Collect)]
 #[collect(no_drop)]
 enum Source<'gc> {
     Owned(Gc<'gc, String>),
     Static(&'static str),
 }
 
+impl fmt::Debug for Source<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Source::Owned(str) => f.debug_tuple("Owned").field(str.deref()).finish(),
+            Source::Static(str) => f.debug_tuple("Static").field(str).finish(),
+        }
+    }
+}
+
 #[derive(Debug, Clone, Copy, Collect)]
 #[collect(no_drop)]
 pub struct AvmString<'gc> {