Replace some utf-8 encoded chars with char entities

It has been said that some chars were not readable as utf-8.

stylesheets/dump-commands.xsl

@@ -62,21 +62,17 @@
   </xsl:template>
 
   <xsl:template match="userinput">
-    <xsl:text>
-</xsl:text>
+    <xsl:text>&#xA;</xsl:text>
     <xsl:if test=".//replaceable">
       <xsl:text># This block must be edited to suit your needs.</xsl:text>
     </xsl:if>
-    <xsl:text>
-</xsl:text>
+    <xsl:text>&#xA;</xsl:text>
     <xsl:apply-templates/>
-    <xsl:text>
-</xsl:text>
+    <xsl:text>&#xA;</xsl:text>
     <xsl:if test=".//replaceable">
       <xsl:text># End of editable block.</xsl:text>
     </xsl:if>
-    <xsl:text>
-</xsl:text>
+    <xsl:text>&#xA;</xsl:text>
   </xsl:template>
 
   <xsl:template match="replaceable">

stylesheets/lfs-xsl/pdf.xsl

@@ -52,8 +52,8 @@
     <!-- Allow URLs to be automatically hyphenated.
          We have expanded the support to several inline tags.
          See pdf/lfs-mixed.xsl. The character in the
-         select attribute is a zero width space, encoded in utf-8-->
-  <xsl:param name="ulink.hyphenate" select="'​'"/>
+         select attribute is a zero width space -->
+  <xsl:param name="ulink.hyphenate" select="'&#x200B;'"/>
 
     <!-- List of characters to allow ulink URLs, and supported inline tags,
          to be automatically hyphenated on.

stylesheets/lfs-xsl/xhtml/lfs-mixed.xsl

@@ -295,8 +295,8 @@
         </xsl:when>
         <xsl:when test="$numcols &gt; 3">
         <!-- the character in the <td> element is a non breaking space
-             (unicode A0), encoded in utf-8 -->
-          <td> </td>
+             (unicode A0) -->
+          <td>&#xA0;</td>
         </xsl:when>
         <xsl:otherwise/>
       </xsl:choose>

stylesheets/patcheslist.xsl

@@ -107,8 +107,7 @@ exit</xsl:text>
         </xsl:otherwise>
       </xsl:choose>
       <xsl:value-of select="$patch.name"/>
-      <xsl:text> .
-</xsl:text>
+      <xsl:text> .&#xA;</xsl:text>
     </xsl:if>
   </xsl:template>