I ran a white-space checker, which will flag any white-space problems that will cause jcheck to fail. The following files were flagged:

src/jdk.jpackage/linux/classes/jdk/jpackage/internal/LinuxAppBundler.java :trailingWhitespace:
src/jdk.jpackage/share/classes/jdk/jpackage/internal/AbstractAppImageBuilder.java :trailingWhitespace:
src/jdk.jpackage/share/classes/jdk/jpackage/internal/Arguments.java :trailingWhitespace:
src/jdk.jpackage/share/classes/jdk/jpackage/internal/BasicBundlers.java :trailingWhitespace:
src/jdk.jpackage/share/classes/jdk/jpackage/internal/StandardBundlerParam.java :trailingWhitespace:
src/jdk.jpackage/share/native/libapplauncher/FilePath.cpp :tabs:
src/jdk.jpackage/share/native/libapplauncher/FilePath.h :trailingWhitespace:

The attached patch should fix this.