3bcc0059b8 Add lint-include-guards.sh which checks include guard consistency (practicalswift) 8fd6af89a0 Fix missing or inconsistent include guards (practicalswift) 8af65d96f4 Document include guard convention (practicalswift) Pull request description: * **Documentation**: Document include guard convention * **Fix**: Fix missing or inconsistent include guards * **Regression test**: Add `lint-include-guards.sh` which checks include guard consistency Tree-SHA512: 8171878f60fd08ccbea943a11e835195750592abb9d7ab74eaa4265ae7fac523b1da9d31ca13d6ab73dd596e49986bfb7593c696e5f39567c93e610165bc2acc
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