1. Summarise the issue (what were doing, what went wrong?)

I was trying to figure out whether --keep-date or --no-keep-date was the 
default for "darcs rebase unsuspend". I found the default here was not 
documented in the online help, or in the manual.

The same pair of flags is also used in darcs amend-record, and no default 
is specified there, either. 

2. What behaviour were you expecting instead?

I expected the deafult to be documented. 

3. What darcs version are you using? (Try: darcs --exact-version)

Darcs 2.9.6.

Heffalump confirmed the default is --no-keep-date. I created a doc-patch 
for it, which can be pulled to resolved this:

http://hub.darcs.net/markstos/darcs-screened/patch/20121212191403-20bb4

The following patch sent by Mark Stosberg <mark@summersault.com> updated issue Issue2278 with
status=resolved;resolvedin=2.10.0 HEAD

* Resolve Issue2278: Document default value for --keep-date / --no-keep-date 
Ignore-this: 47a96d2e8cf6d3b134100128ceed6a35