doc: guidelines: add a note about ascii and emojis
Add a note about source files encoding and emojis. Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
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@ -459,6 +459,8 @@ exceptions:
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comment, ``//``, is not allowed.
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* Use ``/** */`` for doxygen comments that need to appear in the documentation.
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* Avoid using binary literals (constants starting with ``0b``).
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* Avoid using non-ASCII symbols in code, unless it significantly improves
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clarity, avoid emojis in any case.
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When there are differences between the guidelines above and the formatting
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generated by code formatting tools, the guidelines above take precedence.
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