Remove quotes from stacktrace to work better with mysqldumpslow

[hsource]

Motivation

After dumpling slow query logs with our stacktraces using the mysqldumpslow shell script that comes with MySQL/MariaDB, the stacktraces all get truncated to /* stacktrace='S' */ which isn't very useful.

Fix

Just don't surround the stacktraces with a single quote.

Testing

Ran yarn add wanderlog/sqlcommenter-sequelize#harry-quotes and then ran the db/index.test.ts test file and verified the output included the stacktrace:

    expect(query).toMatchInlineSnapshot(`
      "Executing (default): SELECT \`id\` FROM \`Users\` AS \`User\` LIMIT 1; /* stacktrace=
      at doFindOne /Users/harry/Code/itineraries/server/libs/db/index.test.ts:17:3
      at Object.anonymous /Users/harry/Code/itineraries/server/libs/db/index.test.ts:7:5 */"
    `);