Fix syntax error in alignment.py - simplify complex list comprehension

alignment.py

@@ -25,13 +25,12 @@ class AbAlignment:
     
     def align_encodings(self, encodings, numbered_seqs, seqs, number_alignment):
         
-        aligned_encodings = np.concatenate(
-            [[
-                create_alignment(
-                    res_embed, numbered_seq, seq, number_alignment
-                ) for res_embed, numbered_seq, seq in zip(encodings, numbered_seqs, seqs)
-            ]], axis=0
-        )
+        aligned_list = [
+            create_alignment(
+                res_embed, numbered_seq, seq, number_alignment
+            ) for res_embed, numbered_seq, seq in zip(encodings, numbered_seqs, seqs)
+        ]
+        aligned_encodings = np.concatenate([aligned_list], axis=0)
         return aligned_encodings