# 3. "rev1" "rev2 is equivalent to "rev1..rev2"
#
# We want to take a sequence of "rev1..rev2" in general.
+# Also, "rev1.." should mean "rev1..HEAD"; git-diff users are
+# familiar with that syntax.
case "$#,$1" in
1,?*..?*)
# single "rev1..rev2"
;;
+1,?*..)
+ # single "rev1.." should mean "rev1..HEAD"
+ set x "$1"HEAD
+ shift
+ ;;
1,*)
# single rev1
set x "$1..HEAD"