- Say what the error is first ("cannot open %s", not "%s: cannot open")
+Externally Visible Names
+
+ - For configuration variable names, follow the existing convention:
+
+ . The section name indicates the affected subsystem.
+
+ . The subsection name, if any, indicates which of an unbounded set
+ of things to set the value for.
+
+ . The variable name describes the effect of tweaking this knob.
+
+ The section and variable names that consist of multiple words are
+ formed by concatenating the words without punctuations (e.g. `-`),
+ and are broken using bumpyCaps in documentation as a hint to the
+ reader.
+
+ When choosing the variable namespace, do not use variable name for
+ specifying possibly unbounded set of things, most notably anything
+ an end user can freely come up with (e.g. branch names). Instead,
+ use subsection names or variable values, like the existing variable
+ branch.<name>.description does.
+
+
Writing Documentation:
Most (if not all) of the documentation pages are written in the