Python exceptions are now shown in the info editor, this also resolves an old bug where errors were printed twice. This was originally based on D9752 by @ShadowChaser although many changes have been made from the original patch. Details: - BPy_errors_to_report no longer prints additional output. - BKE_report_print_test was added so it's possible to check if calling BKE_report also printed to the stdout. - Callers to BPy_errors_to_report are responsible for ensuring output is printed to the stdout/stderr. - Python exceptions no longer add a trailing newline, needed to avoid blank-space when displayed in the info-editor.