Font size setting explanation is a bit misleading in documentation

[Nick Payne]

In the text formatting documentation at 
http://lilypond.org/doc/v2.15/Documentation/notation/formatting-text, 
when talking about the size of characters, the phrasing at one point is: 
"the font size can be set to an absolute value with \fontsize". Maybe 
this should be changed to something like "the font size can be set to an 
particular numeric value with \fontsize", as \fontsize is still relative 
to the staff size, and the size of the font will change if the staff 
size changes.

Rather strangely, \abs-fontsize, which does set the absolute size of the 
font without regard to the staff size, doesn't get a mention in this 
section, but only in s.A.9.1.

Nick
<http://lilypond.org/doc/v2.15/Documentation/notation/formatting-text>