\repeat with upbeat (partial) and alternatives

[E . Weehaeli]

it is only after a long search that I found an easy way to repeat a part of a 
melody 
- with an upbeat 
- ending before the end of a measure 
- having different durations in the alternatives
- without producing warnings in the log

isn't this a third way that should/could be added to the examples in the manual 
[NR 1.4.1.1 Normal repeats: "Repeats with upbeats can be entered in two 
ways...."]
or ... - did I miss something?

\version "2.11.49"
{ 
 \repeat volta 2 { \partial 8 c'8 | c'2.}
 \alternative {{ f'8 } { \partial 4 f'4 | }}
 d'1 |
 }