nixos doc: module meta attribute section cleanup

nixos/doc/manual/development/meta-attributes.xml

@@ -4,20 +4,20 @@
         version="5.0"
         xml:id="sec-meta-attributes">
 
-<title>Meta-attributes</title>
+<title>Meta Attributes</title>
 
-<para>Like Nix packages, NixOS modules can declare meta-attributes to provide 
+<para>Like Nix packages, NixOS modules can declare meta-attributes to provide
-  extra information.  Module meta-attributes are defined in the 
+  extra information. Module meta attributes are defined in the
-  <filename 
+  <filename
-    xlink:href="https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/misc/meta.nix">meta.nix</filename> 
+    xlink:href="https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/misc/meta.nix">meta.nix</filename>
   special module.</para>
 
-<para><literal>meta</literal> is a top level attribute like 
+<para><literal>meta</literal> is a top level attribute like
-  <literal>options</literal> and <literal>config</literal>. Available 
+  <literal>options</literal> and <literal>config</literal>. Available
-  meta-attributes are <literal>maintainers</literal> and 
+  meta-attributes are <literal>maintainers</literal> and
   <literal>doc</literal>.</para>
 
-<para>Each of the meta-attributes must be defined at most once per module 
+<para>Each of the meta-attributes must be defined at most once per module
   file.</para>
 
 <programlisting>
@@ -26,13 +26,13 @@
   options = {
     ...
   };
-  
+
   config = {
     ...
   };
-  
+
   meta = {
-    maintainers = with lib.maintainers; [ ericsagnes ]; <co 
+    maintainers = with lib.maintainers; [ ericsagnes ]; <co
       xml:id='modules-meta-1' />
     doc = ./default.xml; <co xml:id='modules-meta-2' />
   };
@@ -48,11 +48,11 @@
 
  <callout arearefs='modules-meta-2'>
   <para>
-    <varname>doc</varname> point to a valid docbook file containing the module 
+    <varname>doc</varname> points to a valid DocBook file containing the module
-    documentation, its contents are automatically added to the <xref 
+    documentation. Its contents is automatically added to <xref
       linkend="ch-configuration"/>.
-    Changes to a module documentation must be checked to be non-breaking by 
+    Changes to a module documentation have to be checked to not break
-    building the NixOS manual.
+    building the NixOS manual:
   </para>
   <programlisting>$ nix-build nixos/release.nix -A manual</programlisting>
  </callout>