Update

cssnext.md

@@ -39,7 +39,7 @@ a {
   color: #0000ff80;      /* rgba(0, 0, 255, 0.5) */
 
   color: hwb(90, 0%, 0%, 0.5);     /* like hsl() but easier for humans */
-  color: hsl(90deg 90% 70%%);      /* hsl(180, 90%, 70%) -- supports deg */
+  color: hsl(90deg 90% 70%);       /* hsl(180, 90%, 70%) -- supports deg */
   color: hsl(90deg 90% 70% / 30%); /* hsla(180, 90%, 70%, 0.3) */
   color: rgb(30 60 90 / 30%);      /* rgba(30, 60, 90, 0.3) */
 }

phoenix-ecto.md

@@ -32,6 +32,9 @@ end
 
 ```elixir
 def changeset(user, params \\ :empty) do
+  %User{}
+  |> Ecto.Changeset.change   # basic casting to changeset
+
   user
   |> cast(params, ~w(name email), ~w(age)) # params to Changeset
 
@@ -54,8 +57,8 @@ def changeset(user, params \\ :empty) do
 
   |> unique_constraint(:email)
   |> foreign_key_constraint(:post_id)
-  |> assoc_constraint(:post)   # ensure post_id exists
+  |> assoc_constraint(:post)      # ensure post_id exists
-  |> exclude_constraint(:name)
+  |> no_assoc_constraint(:post)   # negative (useful for deletions)
 end
 ```
 
@@ -64,7 +67,8 @@ changeset.valid?
 changeset.errors     #=> [title: "empty"]
 
 changeset.changes    #=> %{}
-changeset.params
+changeset.params[:title]
+
 changeset.required   #=> [:title]
 changeset.optional   #=> [:body]
 ```