Avoid spaces between <option> and <replaceable>

* man/chage.1.xml: Add a non breaking space between options and
	their parameter because xml2po removes those spaces. Alioth#314401
	* man/chfn.1.xml: Likewise.
	* man/chgpasswd.8.xml: Likewise.
	* man/chpasswd.8.xml: Likewise.
	* man/chsh.1.xml: Likewise.
	* man/faillog.8.xml: Likewise.
	* man/gpasswd.1.xml: Likewise.
	* man/groupadd.8.xml: Likewise.
	* man/groupdel.8.xml: Likewise.
	* man/groupmems.8.xml: Likewise.
	* man/groupmod.8.xml: Likewise.
	* man/grpck.8.xml: Likewise.
	* man/lastlog.8.xml: Likewise.
	* man/newusers.8.xml: Likewise.
	* man/passwd.1.xml: Likewise.
	* man/pwck.8.xml: Likewise.
	* man/pwconv.8.xml: Likewise.
	* man/su.1.xml: Likewise.
	* man/useradd.8.xml: Likewise.
	* man/userdel.8.xml: Likewise.
	* man/usermod.8.xml: Likewise.
	* man/vipw.8.xml: Likewise.

man/su.1.xml

@@ -148,8 +148,7 @@
     <variablelist remap='IP'>
       <varlistentry>
 	<term>
-	  <option>-c</option>, <option>--command</option>
-	  <replaceable>COMMAND</replaceable>
+	  <option>-c</option>, <option>--command</option>&nbsp;<replaceable>COMMAND</replaceable>
 	</term>
 	<listitem>
 	  <para>
@@ -186,8 +185,7 @@
       </varlistentry>
       <varlistentry>
 	<term>
-	  <option>-s</option>, <option>--shell</option>
-	  <replaceable>SHELL</replaceable>
+	  <option>-s</option>, <option>--shell</option>&nbsp;<replaceable>SHELL</replaceable>
 	</term>
 	<listitem>
 	  <para>The shell that will be invoked.</para>