hgview #9101 show file names on renaming [validation pending]

show file names on renaming : when renaming a file, one should see in the body of the commit the full path of the two files like:

=== path/to/file.py ===
moving "path/to/file.py" to "path/to/new/file.py"

for now we see nothing, which is particulary confusing when the renaming is included in another commit with no special comment on that renaming, hence the fact that a renaming occured is invisible. Remark also that it is a regression as this was the default behavior in previous versions.