5.4.5 Technical writing style
These refer to the NR.  The LM uses a more gentle, colloquial
style.
- 
Do not refer to LilyPond in the text.  The reader knows what the
manual is about.  If you do, capitalization is LilyPond.
 - 
If you explicitly refer to ‘lilypond’ the program (or any other
command to be executed), write 
@command{lilypond}.
 - 
Do not explicitly refer to the reader/user.  There is no one else
besides the reader and the writer.
 - 
Avoid contractions (don’t, won’t, etc.).  Spell the words out completely.
 - 
Avoid abbreviations, except for commonly used abbreviations of foreign
language terms such as etc. and i.e.
 - 
Avoid fluff (“Notice that,” “as you can see,”
“Currently,”).
 - 
The use of the word ‘illegal’ is inappropriate in most cases.
Say ‘invalid’ instead.