percona-server: fix inreplace code that fails on audit

syncs with mysql formula

Signed-off-by: Jaehoon You <teslamint@gmail.com>

Formula/percona-server.rb

@@ -113,10 +113,9 @@ class PerconaServer < Formula
     rm_rf prefix+"data"
 
     # Fix up the control script and link into bin
-    inreplace "#{prefix}/support-files/mysql.server" do |s|
-      s.gsub!(/^(PATH=".*)(")/, "\\1:#{HOMEBREW_PREFIX}/bin\\2")
-    end
-
+    inreplace "#{prefix}/support-files/mysql.server",
+              /^(PATH=".*)(")/,
+              "\\1:#{HOMEBREW_PREFIX}/bin\\2"
     bin.install_symlink prefix/"support-files/mysql.server"
 
     # Install my.cnf that binds to 127.0.0.1 by default