platform_system_core/.clang-format-4

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UseTab: Never
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Add a 2 width option of clang format. Make the default the 4 tab space version. Add a link to the 2 space version for libbacktrace. The only other difference between the 4 space and 2 space tab version is that the 2 space tab version allows short functions on a single line. This is for things like constructors, short destructors, or accessor functions. I believe this is closer to the Google C++ style guide. Bug: 36046320 Test: NA Change-Id: Ida08db18902eeb101f42869dd5590182529d54ef 2017-03-10 20:25:32 +01:00			`BasedOnStyle: Google`
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			`CommentPragmas: NOLINT:.*`
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			`UseTab: Never`
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