Remove @ as an ATOM character, syncing with upstream tmail. [mikel] Closes #10317

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8246 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionmailer/lib/action_mailer/vendor/tmail-1.1.0/tmail/scanner_r.rb

@@ -44,7 +44,7 @@ class Scanner_R
     }
 
     alnum      = 'a-zA-Z0-9'
-    atomsyms   = %q[  _#!$%&`'*+-{|}~^@/=?  ].strip
+    atomsyms   = %q[  _#!$%&`'*+-{|}~^/=?  ].strip
     tokensyms  = %q[  _#!$%&`'*+-{|}~^@.    ].strip
 
     atomchars  = alnum + Regexp.quote(atomsyms)