Reindent all XSD files for consistency

This make it easier to compare the files across versions, as well as
improves readability.

The update was done using

  for x in $(find . -name '*.xsd'); do
    xmllint --format "$x" > "$x.new" && mv "$x.new" "$x"
  done

on Debian GNU/Linux, but any system with xmllint available will do.

ADDML/latest/addml.xsd

@@ -1,8 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<xs:schema xmlns:addml="http://www.arkivverket.no/standarder/addml"
-  xmlns:xs="http://www.w3.org/2001/XMLSchema"
-  targetNamespace="http://www.arkivverket.no/standarder/addml" elementFormDefault="qualified"
-  version="8.3">
+<xs:schema xmlns:addml="http://www.arkivverket.no/standarder/addml" xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.arkivverket.no/standarder/addml" elementFormDefault="qualified" version="8.3">
   <xs:annotation>
     <xs:documentation xml:lang="en">
       Changes made in versions up to 8.2 are not documented in this document.
@@ -136,7 +133,7 @@
       </xs:sequence>
       <xs:attribute name="name" type="xs:string" use="required"/>
       <xs:attribute name="typeReference" type="xs:string"/>
-    </xs:complexType>    
+    </xs:complexType>
   </xs:element>
   <xs:element name="recordDefinitionFieldValue" type="xs:string"/>
   <xs:element name="incomplete">
@@ -485,7 +482,6 @@
       <xs:attribute name="name" type="xs:string" use="required"/>
     </xs:complexType>
   </xs:element>
-
   <xs:element name="dataObjects">
     <xs:complexType>
       <xs:sequence>
@@ -550,4 +546,4 @@
   <xs:element name="headerLevel" type="xs:integer"/>
   <xs:element name="recordSeparator" type="xs:string"/>
   <xs:element name="value" type="xs:string"/>
-</xs:schema>
+</xs:schema>