Tutorial document content error

There seem to be a lot of errors in the tutorial documentation in this link.
( https://doc.qt.io/qtforpython/tutorials/expenses/expenses.html) The error that obviously affects reading comprehension is the last code box under the title of Right side layout. The code box here should be about the layout on the left, but it actually gives a lot of import codes

Other errors, such as the code box under the title of the Empty chart view, the code highlight should be on the 8th line, but it is actually on the 9th line, etc. There are also many errors in the position of the highlighted line of code in this link.