Use `ArgumentError` instead of `CaskError` in `CLI`.

1 files changed, 2 insertions, 2 deletions

diff --git a/Library/Homebrew/cask/lib/hbc/cli.rb b/Library/Homebrew/cask/lib/hbc/cli.rb
index 8e178e373..102446ea4 100644
--- a/Library/Homebrew/cask/lib/hbc/cli.rb
+++ b/Library/Homebrew/cask/lib/hbc/cli.rb
@@ -228,9 +228,9 @@ module Hbc
           remaining << head
           retry
         rescue OptionParser::MissingArgument
-          raise CaskError, "The option '#{head}' requires an argument"
+          raise ArgumentError, "The option '#{head}' requires an argument."
         rescue OptionParser::AmbiguousOption
-          raise CaskError, "There is more than one possible option that starts with '#{head}'"
+          raise ArgumentError, "There is more than one possible option that starts with '#{head}'."
         end
       end