Fix BSD compatibility #245
Merged
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On macOS, Perl-compatible regex option (-P) in GNU grep is not available by default. It can be replaced with sed. While using 'tr', it is necessary to set the locale to "C" ensures that tr interprets the byte stream in a consistent, ASCII-only manner. This prevents errors like "Illegal byte sequence" on BSD systems such as macOS.
Change-Id: I1c134092a5fb2afc8018a638e172fb0b380e0fdd