internal: remove erroneous default impl

1 files changed, 5 insertions, 1 deletions

diff --git a/docs/dev/style.md b/docs/dev/style.md
index 696a175a847..7e8e41a4178 100644
--- a/docs/dev/style.md
+++ b/docs/dev/style.md
@@ -312,7 +312,7 @@ Even when generality is not required, consistency is important.
 
 ## Constructors
 
-Prefer `Default` to zero-argument `new` function
+Prefer `Default` to zero-argument `new` function.
 
 ```rust
 // GOOD
@@ -341,6 +341,10 @@ Use `Vec::new` rather than `vec![]`.
 
 **Rationale:** uniformity, strength reduction.
 
+Avoid using "dummy" states to implement a `Default`.
+If a type doesn't have a sensible default, empty value, don't hide it.
+Let the caller explicitly decide what's the right initial state is.
+
 ## Functions Over Objects
 
 Avoid creating "doer" objects.