Duplicate something in working copy or repository, remembering
history.
usage: copy SRC[@REV]... DST
When copying multiple sources, they will be added as children of DST,
which must be a directory.
SRC and DST can each be either a working copy (WC) path or URL:
WC -> WC: copy and schedule for addition (with history)
WC -> URL: immediately commit a copy of WC to URL
URL -> WC: check out URL into WC, schedule for addition
URL -> URL: complete server-side copy; used to branch and tag
All the SRCs must be of the same type.
WARNING: For compatibility with previous versions of Subversion,
copies performed using two working copy paths (WC -> WC) will not
contact the repository. As such, they may not, by default, be able
to propagate merge tracking information from the source of the copy
to the destination.