Improve handling of trailing whitespace in API dump files

[aSemy]

Currently, any API dump that BCV produces contains two trailing whitespaces lines, \n\n.

I have enabled 'strip trailing whitespace' in IntelliJ https://stackoverflow.com/questions/20679842/remove-trailing-whitespace-on-save-in-intellij-idea-12

When I open a .api file, which might automatically happen during a commit dialog, IntelliJ will replace the two trailing \n\n with a single \n. This is annoying, because then BCV will fail the test.

Other editors might also have problems with different types of behaviour that are difficult to predict or control.

Could BCV be changed to ignore any difference in trailing whitespace?