chore: import upstream snapshot with attribution

testing/generation/command_docs/synopses/alter_view.txt

@@ -0,0 +1,21 @@
+ALTER VIEW [ IF EXISTS ] $name$ ALTER [ COLUMN ] $column_name$ SET DEFAULT $expression$
+
+ALTER VIEW [ IF EXISTS ] $name$ ALTER [ COLUMN ] $column_name$ DROP DEFAULT
+
+ALTER VIEW [ IF EXISTS ] $name$ OWNER TO { $new_owner$ | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
+
+ALTER VIEW [ IF EXISTS ] $name$ RENAME [ COLUMN ] $column_name$ TO $new_column_name$
+
+ALTER VIEW [ IF EXISTS ] $name$ RENAME TO $new_name$
+
+ALTER VIEW [ IF EXISTS ] $name$ SET SCHEMA $new_schema$
+
+ALTER VIEW [ IF EXISTS ] $name$ SET ( $view_option_value$ [ , ... ] )
+
+ALTER VIEW [ IF EXISTS ] $name$ RESET ( $view_option_name$ [ , ... ] )
+
+where $view_option_value$ is:
+
+check_option [ = $string_literal$ ] |
+    security_barrier [ = $boolean$ ] |
+    security_invoker [ = $boolean$ ]