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bc21467e5507ca041dcd1162cb524d2a01fd17d6 by Abseil Team <absl-team@google.com>:

Fix mistakes in license boilerplate:
- randen_detect.cc had a space removed
- arg_test.cc had a truncated header

PiperOrigin-RevId: 340484448
GitOrigin-RevId: bc21467e5507ca041dcd1162cb524d2a01fd17d6
Change-Id: I654080c9c84f28017384a3f30bcb17d7cf43b881