+ There's also documentation in the header files. The header file
+ comments were, in general, written at the same time as the code.
+ This has the disadvantage that they focus at a fairly low level,
+ and use terminology relating to the implementation rather than
+ the interface.
+
+ The header file comments can be handy for quick browsing.
+ However, the manual pages are considered the authoritative
+ source of information about the programming interface. If you
+ have to look at the source code, it usually means that my
+ documentation or interface design is wrong.
+