clean up some formatting

main.py

@@ -202,23 +202,29 @@ class MainWindow(QMainWindow, Ui_MainWindow):
 
 SQL_CMDS = [
     "PRAGMA foreign_keys=ON",
+    #
     "CREATE TABLE IF NOT EXISTS words "
     "(word_id INTEGER PRIMARY KEY AUTOINCREMENT, word TEXT, definition TEXT)",
+    #
     "CREATE TABLE IF NOT EXISTS books "
     "(book_id INTEGER PRIMARY KEY AUTOINCREMENT, title TEXT, author TEXT, "
     "uuid TEXT, level INTEGER)",
+    #
     "CREATE TABLE IF NOT EXISTS sections "
     "(section_id INTEGER PRIMARY KEY AUTOINCREMENT, "
     "sequence INTEGER, content TEXT, "
     "book_id INTEGER REFERENCES books ON DELETE CASCADE)",
+    #
     "CREATE TABLE IF NOT EXISTS people "
     "(person_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, "
     "organization TEXT, book_id INTEGER REFERENCES books ON DELETE CASCADE)",
+    #
     "CREATE TABLE IF NOT EXISTS person_book "
     "(person_id INTEGER REFERENCES people ON DELETE CASCADE, "
     "book_id INTEGER REFERENCES books ON DELETE CASCADE, "
     "section_id INTEGER REFERENCES sections, "
     "block INTEGER)",
+    #
     "CREATE TABLE IF NOT EXISTS word_block "
     "(word_id INTEGER REFERENCES words ON DELETE CASCADE, "
     "section_id INTEGER REFERENCES sections ON DELETE CASCADE, "
@@ -275,15 +281,9 @@ def schema_update(db: QSqlDatabase) -> None:
         # step 5 transfer content
         coldefs = re.search(r"\((.+)\)", old).group(1).split(", ")  # type: ignore[union-attr]
         cols = [x.split(" ")[0] for x in coldefs]
+        cols_str = ", ".join(cols)
         if not query.exec(
-            "INSERT INTO "
-            + new_table_name
-            + "("
-            + ", ".join(cols)
-            + ") SELECT "
-            + ", ".join(cols)
-            + " FROM "
-            + table_name
+            f"INSERT INTO {new_table_name} ({cols_str}) SELECT {cols_str} FROM {table_name}"
         ):
             query_error(query)