Print Area and Row Break

[oleibman]

Fix #1275, which had been closed as stale, and is now reopened pending the implementation of this PR. If there is a page break inside a defined print area, Excel may not render the print correctly unless the xml brk tag contains a max attribute. Libre Office renders it correctly. This seems like a bug in Excel (https://learn.microsoft.com/en-us/openspecs/office_standards/ms-oe376/b32ae11b-dee7-4dcb-9b46-a0feb32ce94f states that Office ignores min and max). PR #3345 (issue #3143) already addressed this problem by allowing the user to explicitly specify a max property in the PageBreak object. This PR eliminates the need for the user to make use of that kludge, by adding max to the xml whenever a page break is specified on a sheet with a defined print area. Xlsx Reader will now ignore the max attribute for row breaks, since it is no longer needed; it already ignores it for column breaks. The user may still set the max property if desired, just in case the new treatment is not adequate (I have not found a case where that is true). Two existing unit tests are very marginally changed because of this PR.

This is:

• a bugfix
• a new feature
• refactoring
• additional unit tests

Checklist:

• Changes are covered by unit tests
  • Changes are covered by existing unit tests
  • New unit tests have been added
• Code style is respected
• Commit message explains why the change is made (see https://github.com/erlang/otp/wiki/Writing-good-commit-messages)
• CHANGELOG.md contains a short summary of the change and a link to the pull request if applicable
• Documentation is updated as necessary

Why this change is needed?

Provide an explanation of why this change is needed, with links to any Issues (if appropriate).
If this is a bugfix or a new feature, and there are no existing Issues, then please also create an issue that will make it easier to track progress with this PR.