[evolution] help: Describe the regex type supported in vfolder search

[Andre Klapper <aklapper src gnome org>]

commit 6607a52a37469496c8bde01c89a86adbcded60cc
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun Jan 24 09:47:49 2021 +0100

    help: Describe the regex type supported in vfolder search
    
    Fixes #1343

 help/C/xinclude-filter-vfolder-conditions.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/xinclude-filter-vfolder-conditions.xml b/help/C/xinclude-filter-vfolder-conditions.xml
index 2c7264374f..39efceb1c3 100644
--- a/help/C/xinclude-filter-vfolder-conditions.xml
+++ b/help/C/xinclude-filter-vfolder-conditions.xml
@@ -59,6 +59,6 @@
 <p>Filters based on the mailing list the message came from. This filter checks for a variety of common 
mailing list related headers but might miss messages from some list servers if they use uncommon 
headers.</p></item>
 
 <item><p>Regex Match:</p>
-<p>(For programmers only) If you know your way around a <link 
href="https://en.wikipedia.org/wiki/Regular_expression";>regex</link>, or regular expression, this option 
allows you to search for complex patterns of letters, so that you can find, for example, all words that start 
with "a" and end with "m", and are between six and fifteen letters long, or all messages that declare a 
particular header twice. For information about how to use regular expressions, check <link 
href="man:grep">the man page for the <cmd>grep</cmd></link> command.</p></item>
+<p>(For advanced users) If you know your way around a <link 
href="https://en.wikipedia.org/wiki/Regular_expression";>regex</link>, or regular expression, this option 
allows you to search for complex patterns of letters, so that you can find, for example, all words that start 
with "a" and end with "m", and are between six and fifteen letters long, or all messages that declare a 
particular header twice. <app>Evolution</app> supports the Extended Regular Expression syntax 
(ERE).</p></item>
 
 </info>