output by allowing them to allocate space in advance.
-L <start>,<end>:<file>::
--L :<regex>:<file>::
+-L :<funcname>:<file>::
Trace the evolution of the line range given by "<start>,<end>"
- (or the funcname regex <regex>) within the <file>. You may
+ (or the function name regex <funcname>) within the <file>. You may
not give any pathspec limiters. This is currently limited to
a walk starting from a single revision, i.e., you may only
give zero or one positive revision arguments.