Remove default argument from Homebrew::InstallationError

This class is never instantiated directly, and all subclasses
initializers have different signatures and do not rely on this.

1 files changed, 1 insertions, 1 deletions

diff --git a/Library/Homebrew/exceptions.rb b/Library/Homebrew/exceptions.rb
index a45a5de77..9cb0fcb9c 100644
--- a/Library/Homebrew/exceptions.rb
+++ b/Library/Homebrew/exceptions.rb
@@ -83,7 +83,7 @@ module Homebrew
   class InstallationError < RuntimeError
     attr_reader :formula
 
-    def initialize formula, message=""
+    def initialize(formula, message)
       super message
       @formula = formula
     end