WhitespaceCharacterPainter: fix off-by-one error at CR and LF offsets#2418

BeckerWdf merged 1 commit intoeclipse-platform:mastereclipse-platform/eclipse.platform.ui:masterfrom

tobiasmelcher:whitespace_character_paintertobiasmelcher/eclipse.platform.ui:whitespace_character_painterCopy head branch name to clipboard