Mark unused variables with underscore-prefix.

This stops warnings when running with "ruby -w".

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/custodian/alerts/mauve.rb b/lib/custodian/alerts/mauve.rb
index d2b3a12..5a00557 100644
--- a/lib/custodian/alerts/mauve.rb
+++ b/lib/custodian/alerts/mauve.rb
@@ -318,7 +318,7 @@ module Custodian
                 ress.map { |r| ips.push(r.address.to_s) }
               end
             end
-          rescue Timeout::Error => e
+          rescue Timeout::Error => _e
             return ''
           end
         end