Merge pull request #8143 from Bo98/formula-each

formula: don't catch errors in the Formula.each yield

Library/Homebrew/formula.rb

@@ -1461,14 +1461,16 @@ class Formula
   # @private
   def self.each
     files.each do |file|
-      yield Formulary.factory(file)
-    rescue => e
+      yield begin
+        Formulary.factory(file)
+      rescue FormulaUnavailableError => e
         # Don't let one broken formula break commands. But do complain.
         onoe "Failed to import: #{file}"
         puts e
         next
       end
     end
+  end
 
   # Clear cache of .racks
   def self.clear_racks_cache