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/groupmems.8.xml

@@ -104,7 +104,7 @@
     </para>
     <variablelist remap='IP'>
       <varlistentry>
-	<term><option>-a</option>, <option>--add</option> <replaceable>user_name</replaceable></term>
+	<term><option>-a</option>, <option>--add</option>&nbsp;<replaceable>user_name</replaceable></term>
 	<listitem>
 	  <para>Add an user to the group membership list.</para>
 	  <para condition="gshadow">
@@ -115,7 +115,7 @@
 	</listitem>
       </varlistentry>
       <varlistentry>
-	<term><option>-d</option>, <option>--delete</option> <replaceable>user_name</replaceable></term>
+	<term><option>-d</option>, <option>--delete</option>&nbsp;<replaceable>user_name</replaceable></term>
 	<listitem>
 	  <para>Delete a user from the group membership list.</para>
 	  <para condition="gshadow">
@@ -131,7 +131,7 @@
 	</listitem>
       </varlistentry>
       <varlistentry>
-	<term><option>-g</option>, <option>--group</option> <replaceable>group_name</replaceable></term>
+	<term><option>-g</option>, <option>--group</option>&nbsp;<replaceable>group_name</replaceable></term>
 	<listitem>
 	  <para>The superuser can specify which group membership
 	    list to modify.
@@ -163,8 +163,7 @@
       </varlistentry>
       <varlistentry>
 	<term>
-	  <option>-R</option>, <option>--root</option>
-	  <replaceable>CHROOT_DIR</replaceable>
+	  <option>-R</option>, <option>--root</option>&nbsp;<replaceable>CHROOT_DIR</replaceable>
 	</term>
 	<listitem>
 	  <para>