Add migration script message and formatting

migrations/versions/721829b5dd25_.py

-"""empty message
+"""Add pipeline_name column to spacy_nlp_pipeline_models table
 
 Revision ID: 721829b5dd25
 Revises: 31dd42e5ea6f
@@ -17,12 +17,11 @@ depends_on = None
 
 
 def upgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
-    op.add_column('spacy_nlp_pipeline_models', sa.Column('pipeline_name', sa.String(length=64), nullable=True))
-    # ### end Alembic commands ###
+    op.add_column(
+        'spacy_nlp_pipeline_models',
+        sa.Column('pipeline_name', sa.String(length=64), nullable=True)
+    )
 
 
 def downgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
     op.drop_column('spacy_nlp_pipeline_models', 'pipeline_name')
-    # ### end Alembic commands ###