Fix brew-readall

Library/Contributions/examples/brew-readall.rb

@@ -1,7 +1,14 @@
 # `brew readall` tries to import all formulae one-by-one.
 # This can be useful for debugging issues across all formulae
-# when making significant changes to formula.rb
+# when making significant changes to formula.rb,
+# or to determine if any current formulae have Ruby issues
 
 require 'formula'
-names = []
-Formulary.read_all { |name, klass| names << name }
+Formula.names.each do |n|
+  begin
+    f = Formula.factory(n)
+  rescue Exception => e
+    onoe "problem in #{Formula.path(n)}"
+    puts e
+  end
+end