As for more concrete guidelines, just imitate the existing code
(this is a good guideline, no matter which project you are
-contributing to). But if you must have a list of rules,
-here they are.
+contributing to). It is always preferable to match the _local_
+convention. New code added to git suite is expected to match
+the overall style of existing code. Modifications to existing
+code is expected to match the style the surrounding code already
+uses (even if it doesn't match the overall style of existing code).
+
+But if you must have a list of rules, here they are.
For shell scripts specifically (not exhaustive):