fix: missing __all__ + spacing

beet/library/resource_pack.py

@@ -1,4 +1,5 @@
 __all__ = [
+    "Atlas",
     "ResourcePack",
     "ResourcePackNamespace",
     "Blockstate",
@@ -277,12 +278,10 @@ def merge(self, other: "Atlas") -> bool:  # type: ignore
 
     def append(self, other: "Atlas"):
         """Append values from another atlas."""
-
         self.merge(other)
 
     def prepend(self, other: "Atlas"):
         """Prepend values from another atlas."""
-
         values = self.data.setdefault("sources", [])
 
         for value in other.data.get("sources", []):
@@ -291,14 +290,12 @@ def prepend(self, other: "Atlas"):
 
     def add(self, value: JsonDict):
         """Add an entry."""
-
         values = self.data.setdefault("sources", [])
         if value not in values:
             values.append(value)
 
     def remove(self, value: JsonDict):
         """Remove an entry."""
-
         values = self.data.setdefault("sources", [])
         with suppress(ValueError):
             values.remove(value)