bug#9259: extra line in "unless" docstring?

[jidanni]

>>>>> "CY" == Chong Yidong <cyd@stupidchicken.com> writes:
CY> jidanni@jidanni.org writes:

>> unless is a Lisp macro in `subr.el'.
>> 
>> (unless COND BODY...)
>> 
>> If COND yields nil, do BODY, else return nil. <--------what is this
>> line doing here?
>> When COND yields nil, eval BODY forms sequentially and return
>> value of last one, or nil if there are none.

CY> It's the one-line summary of the function.  Every docstring has one.

Well e.g., man pages have headers "SUMMARY" etc. separating the different
parts. If the rendering jammed them all together it would look bad.

Even in debian apt there is indentation:

Description: Web browser based on Firefox
 Iceweasel is Firefox, rebranded. It is a powerful, extensible web browser with
 support for modern web application technologies.