BlockAlign could have the wrong value Before instead of Begin

Author: reknih

src/attributes.rs

@@ -407,7 +407,7 @@ impl LayoutAttributes<'_> {
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
 pub enum BlockAlign {
     /// At the start of the block advance direction.
-    Begin,
+    Before,
     /// Centered.
     Middle,
     /// At the end of the block advance direction.
@@ -419,7 +419,7 @@ pub enum BlockAlign {
 impl BlockAlign {
     pub(crate) fn to_name(self) -> Name<'static> {
         match self {
-            Self::Begin => Name(b"Begin"),
+            Self::Before => Name(b"Before"),
             Self::Middle => Name(b"Middle"),
             Self::After => Name(b"After"),
             Self::Justify => Name(b"Justify"),