[eog] help: Remove Evolution specific reference as it's about any email application

[Andre Klapper <aklapper src gnome org>]

commit f7cb02bd338b62219255678ea4c541d794b99f27
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun Mar 3 12:13:48 2019 +0100

    help: Remove Evolution specific reference as it's about any email application

 help/C/plugin-send-by-mail.page | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/plugin-send-by-mail.page b/help/C/plugin-send-by-mail.page
index 64b8feb9..b9691c1b 100644
--- a/help/C/plugin-send-by-mail.page
+++ b/help/C/plugin-send-by-mail.page
@@ -31,7 +31,7 @@ will give you a <gui style="menuitem">Send by mail</gui> menu item.</p>
 xref="plugins">eog-plugins</link>.</p>
 
 <note>
- <p><app>Evolution mail</app> must be set up to connect to your email account 
+ <p>An installed email application must be set up to connect to your email account 
  for this to work.</p>
 </note>