Doc: standardise level 5 headings (2730)

Doc: standardise level 5 headings (2730)

 - add subsubheadingitalic macro for use as level 5
   heading

 - update CG to document its use

 - amend first 2 sections of Chapter 1 of NR

[John Mandereau, 2012-08-13 08:31:48]

I haven't built (well, a "make all" is going to test this change with "makeinfo
--info", but even only this takes ages on an Intel Atom), but LGTM.  (FWIW I
checked that all occurences have been dealt with in Pitches and Rhythms with
git grep subheading Documentation/notation/*
.)

[Graham Percival, 2012-08-13 08:46:10]

LGTM other than one slightly quibble.

http://codereview.appspot.com/6443116/diff/1/Documentation/common-macros.itexi
File Documentation/common-macros.itexi (right):

http://codereview.appspot.com/6443116/diff/1/Documentation/common-macros.itex...
Documentation/common-macros.itexi:81: @macro subsubheadingitalic {TEXT}
I'm slightly unfond of "italic" in the name, since that mixes formatting
commands with structural commands.  How do you feel about
@subsubsubheading {TEXT}
?

[Trevor Daniels, 2012-08-13 09:23:43]

On 2012/08/13 08:46:10, Graham Percival wrote:

> How do you feel about @subsubsubheading {TEXT}?

Perfectly happy!  I'll change it and complete
Chapter 1 in the next patch set.

[Graham Percival, 2012-08-14 18:59:54]

LGTM

[Trevor Daniels, 2012-08-17 07:54:51]

Pushed to staging as
229e78d781e24469d65e47244fb6eb161be84621
Closing.