man: fix typos

man/dnssec-trust-anchors.d.xml

@@ -121,7 +121,7 @@
     must be <literal>IN</literal>, followed by
     <literal>DNSKEY</literal>. The subsequent words encode the DNSKEY
     flags, protocol and algorithm fields, followed by the key data
-    encoded in Base64. See See <ulink
+    encoded in Base64. See <ulink
     url="https://tools.ietf.org/html/rfc4034#section-2">RFC 4034,
     Section 2</ulink> for details about the precise syntax and meaning
     of these fields.</para>
@@ -152,7 +152,7 @@
     trust anchor via adding in new trust anchor files.</para>
 
     <para>The current DNSSEC trust anchor for the Internet's root
-    domain is available a the <ulink
+    domain is available at the <ulink
     url="https://data.iana.org/root-anchors/root-anchors.xml">IANA
     Trust Anchor and Keys</ulink> page.</para>
   </refsect1>

man/systemd.generator.xml

@@ -315,7 +315,7 @@
     </example>
 
     <example>
-      <title>Debuging a generator</title>
+      <title>Debugging a generator</title>
 
       <programlisting>dir=$(mktemp -d)
 SYSTEMD_LOG_LEVEL=debug &systemgeneratordir;/systemd-fstab-generator \

man/systemd.unit.xml

@@ -875,7 +875,7 @@
 
         <para><varname>ConditionSecurity=</varname> may be used to
         check whether the given security module is enabled on the
-        system. Currently, the recognized values values are
+        system. Currently, the recognized values are
         <varname>selinux</varname>,
         <varname>apparmor</varname>,
         <varname>ima</varname>,

man/systemd.xml

@@ -259,7 +259,7 @@
         <term><option>--machine-id=</option></term>
 
         <listitem><para>Override the machine-id set on the hard drive,
-        userful for network booting or for containers. May not be set
+        useful for network booting or for containers. May not be set
         to all zeros.</para></listitem>
       </varlistentry>