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+@dir /lib/string
+@brief lib/string: Low-level string manipulation.
+
+We have a number of compatibility functions here: some are for handling
+functionality that is not implemented (or not implemented the same) on every
+platform; some are for providing locale-independent versions of libc
+functions that would otherwise be defined differently for different users.
+
+Other functions here are for common string-manipulation operations that we do
+in the rest of the codebase.
+
+Any string function high-level enough to need logging belongs in a
+higher-level module.