Documentation/CodingStyle: improve text layout
Documentation/CodingStyle: improve text layout

Try to make coding style documentation look a bit more readable and
consistent with the following:

 - indent every code example in C to first tab-stop;
 - surround every code example with empty lines, both top and bottom;
 - remove empty lines where text looked way too spare;
 - do not indent examples in elisp and kconfig;
 - do not do any non-whitespace changes.

Signed-off-by: Pavel Kretov <7cae407f1f3b56350827d1394be40a3e8f9cb303@gmail.com>
Signed-off-by: Jonathan Corbet <b2ce64d5587c02f12e367eac59751145a0660c51@lwn.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs