[evolution] Use the fancy Unicode quotation marks in a new string

[Piotr Drąg <piotrdrag src gnome org>]

commit 0da543958afb9027bba52793b0335ffbda89f108
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Jun 27 13:55:12 2017 +0200

    Use the fancy Unicode quotation marks in a new string
    
    See https://developer.gnome.org/hig/stable/typography.html
    
    https://bugzilla.gnome.org/show_bug.cgi?id=774377

 data/org.gnome.evolution.mail.gschema.xml.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/org.gnome.evolution.mail.gschema.xml.in b/data/org.gnome.evolution.mail.gschema.xml.in
index 8f5d928..6cabc22 100644
--- a/data/org.gnome.evolution.mail.gschema.xml.in
+++ b/data/org.gnome.evolution.mail.gschema.xml.in
@@ -426,7 +426,7 @@
     <key name="filters-log-file" type="s">
       <default>''</default>
       <_summary>Logfile to log filter actions</_summary>
-      <_description>If not set, or being 'stdout', then the logging is done to stdout, instead to a 
file.</_description>
+      <_description>If not set, or being “stdout”, then the logging is done to stdout, instead to a 
file.</_description>
     </key>
     <key name="flush-outbox" type="b">
       <default>false</default>