Use a more accurate method name and drop unhelpful block

Library/Homebrew/cmd/search.rb

@@ -62,7 +62,7 @@ module Homebrew extend self
       if count == 0 and not blacklisted? query
         puts "No formula found for #{query.inspect}."
         begin
-          GitHub.find_pull_requests(query) { |pull| puts pull }
+          GitHub.print_pull_requests_matching(query)
         rescue GitHub::Error => e
           opoo e.message
         end

Library/Homebrew/utils.rb

@@ -322,7 +322,7 @@ module GitHub extend self
     issues_matching(name, :state => "open")
   end
 
-  def find_pull_requests query
+  def print_pull_requests_matching(query)
     return if ENV['HOMEBREW_NO_GITHUB_API']
     puts "Searching pull requests..."
 
@@ -339,7 +339,7 @@ module GitHub extend self
       return
     end
 
-    prs.each { |i| yield "#{i["title"]} (#{i["html_url"]})" }
+    prs.each { |i| puts "#{i["title"]} (#{i["html_url"]})" }
   end
 
   def private_repo?(user, repo)