Ticket #9913: 9913.2.diff

wp-includes/pluggable.php

@@ -337 +337 @@
                 }
         }
 
+        if ( !isset( $content_type ) || $content_type = 'text/plain' ) {
+                // Ensure we don't send encoded quotes in plain text emails
+                $encoded_quotes = array( '"', ''' );
+                $decoded_quotes = array( '"', "'" );
+                $subject = str_replace( $encoded_quotes, $decoded_quotes, $subject );
+                $message = str_replace( $encoded_quotes, $decoded_quotes, $message );
+        }
+
         // Empty out the values that may be set
         $phpmailer->ClearAddresses();
         $phpmailer->ClearAllRecipients();