Fixed white space issues... xml2rfc is really picky!

Author: Relequestual

jsonschema-core.xml

@@ -959,15 +959,15 @@
                     current instance location. "$ref" is an applicator key word, applying the referred
                     schema to the instance.
                 </t>
-+                <t>
-+                   The value of the "$ref" property MUST be a string which is a URI Reference.
+                <t>
+                    The value of the "$ref" property MUST be a string which is a URI Reference.
                     Resolved against the current URI base, it identifies the URI of a schema to use.
                 </t>
                 <t>
                     As the value of "$ref" is a URI Reference, this allows the posibility to externalise or
-+                   shard a schema across multiple files, and provides the ability to validate recursive structures
-+                   through self-reference.
-+                </t>
+                    shard a schema across multiple files, and provides the ability to validate recursive structures
+                    through self-reference.
+                </t>
                 <t>
                     The URI is not a network locator, only an identifier. A schema need not be
                     downloadable from the address if it is a network-addressable URL, and