message: Fix some error messages
diff: @@ -161,7 +161,7 @@ impl TypeError {
  ),
  labels: vec![
  Label {
  - message: None, // TODO
  + message: Some("the function".into()),
  style: LabelStyle::Primary,
  span,
  },
  @@ -179,7 +179,7 @@ impl TypeError {
  ),
  labels: vec![
  Label {
  - message: Some("the value".into()),
  + message: Some("the term".into()),
  style: LabelStyle::Primary,
  span,
  },
  