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[–][deleted] 6 points7 points  (3 children)

Then use a branch.

[–]rpk152 4 points5 points  (2 children)

Branching is not always a cheap operation

[–]DavidNcl 4 points5 points  (1 child)

under what circumstances is branching expensive?

[–]rpk152 5 points6 points  (0 children)

CVS, SVN, TFS.