[clang-format] fix PR38525 - Extraneous continuation indent spaces with...

[clang-format] fix PR38525 - Extraneous continuation indent spaces with BreakBeforeBinaryOperators set to All

Summary: See bug report https://bugs.llvm.org/show_bug.cgi?id=38525 for more details.

Reviewers: djasper, klimek, krasimir, sammccall

Reviewed By: sammccall

Subscribers: hiraditya, JonasToth, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D50699

llvm-svn: 340623