man: use <constant> markup for errno value

We were inconsistent, but marking them up as constants makes more
sense then as variables.

1 files changed, 5 insertions, 5 deletions

diff --git a/man/sd_event_add_signal.xml b/man/sd_event_add_signal.xml
index 1517c1021c..6584268818 100644
--- a/man/sd_event_add_signal.xml
+++ b/man/sd_event_add_signal.xml
@@ -134,20 +134,20 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>.
 
     <variablelist>
       <varlistentry>
-        <term><varname>-ENOMEM</varname></term>
+        <term><constant>-ENOMEM</constant></term>
 
         <listitem><para>Not enough memory to allocate an object.</para></listitem>
       </varlistentry>
 
       <varlistentry>
-        <term><varname>-EINVAL</varname></term>
+        <term><constant>-EINVAL</constant></term>
 
         <listitem><para>An invalid argument has been passed.</para></listitem>
 
       </varlistentry>
 
       <varlistentry>
-        <term><varname>-EBUSY</varname></term>
+        <term><constant>-EBUSY</constant></term>
 
         <listitem><para>An handler is already installed for this
         signal or the signal was not blocked previously.</para></listitem>
@@ -155,14 +155,14 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>.
       </varlistentry>
 
       <varlistentry>
-        <term><varname>-ESTALE</varname></term>
+        <term><constant>-ESTALE</constant></term>
 
         <listitem><para>The event loop is already terminated.</para></listitem>
 
       </varlistentry>
 
       <varlistentry>
-        <term><varname>-ECHILD</varname></term>
+        <term><constant>-ECHILD</constant></term>
 
         <listitem><para>The event loop has been created in a different process.</para></listitem>