Misty De Meo 447f78c0d2 brew ln --force is now brew ln --overwrite
* Renames --force to --overwrite, freeing up brew ln --force for Homebrew/homebrew#13349
* Changes --dry-run to preview linking by default, rather than
  overwriting. An overwrite dry-run can be simulated via both
  --dry-run --overwrite
* Adds some basic Keg tests
2012-10-20 21:00:46 -05:00
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