Fix several references to deleted methods and self-references in the documentation

Author: user202729

docs/document.rst

@@ -1307,27 +1307,27 @@ For details on **embedded files** refer to Appendix 3.
 
       *(New in version 1.16.8)*
 
-      PDF only: Return the definition of a PDF object. For details please refer to :meth:`Document.xrefObject`.
+      PDF only: Return the definition of a PDF object.
 
     .. method:: PDFCatalog()
 
       *(New in version 1.16.8)*
 
-      PDF only: Return the :data:`xref` of the PDF catalog (or root) object. For details please refer to :meth:`Document._getPDFroot`.
+      PDF only: Return the :data:`xref` of the PDF catalog (or root) object.
 
 
     .. method:: PDFTrailer(compressed=False)
 
       *(New in version 1.16.8)*
 
-      PDF only: Return the trailer of the PDF (UTF-8), which is usually located at the PDF file's end. For details please refer to :meth:`Document._getTrailerString`.
+      PDF only: Return the trailer of the PDF (UTF-8), which is usually located at the PDF file's end.
 
 
     .. method:: metadataXML()
 
       *(New in version 1.16.8)*
 
-      PDF only: Return the :data:`xref` of the document's XML metadata. For details please refer to :meth:`Document._getXmlMetadataXref`.
+      PDF only: Return the :data:`xref` of the document's XML metadata.
 
     .. method:: xrefStream(xref)
 
@@ -1517,7 +1517,7 @@ Clear metadata information. If you do this out of privacy / data protection conc
 {'producer': 'none', 'format': 'PDF 1.4', 'encryption': None, 'author': 'none',
 'modDate': 'none', 'keywords': 'none', 'title': 'none', 'creationDate': 'none',
 'creator': 'none', 'subject': 'none'}
->>> doc._delXmlMetadata()    # clear any XML metadata
+>>> doc.del_xml_metadata()    # clear any XML metadata
 >>> doc.save("anonymous.pdf", garbage = 4)       # save anonymized doc
 
 :meth:`setToC` Demonstration

docs/faq.rst

@@ -2125,11 +2125,11 @@ ID      array       File identifier consisting of two byte strings.
 XRefStm int         Offset of a cross-reference stream. See :ref:`AdobeManual` p. 109.
 ======= =========== ===================================================================================
 
-Access this information via PyMuPDF with :meth:`Document._getTrailerString`.
+Access this information via PyMuPDF with :meth:`Document.PDFTrailer`.
 
     >>> import fitz
     >>> doc=fitz.open("PyMuPDF.pdf")
-    >>> trailer=doc._getTrailerString()
+    >>> trailer=doc.PDFTrailer()
     >>> print(trailer)
     <</Size 5535/Info 5275 0 R/Root 5274 0 R/ID[(\340\273fE\225^l\226\232O|\003\201\325g\245)(}#1,\317\205\000\371\251wO6\352Oa\021)]>>
     >>>
@@ -2162,4 +2162,4 @@ Using some XML package, the XML data can be interpreted and / or modified and th
     >>> doc.updateStream(metaxref, xmlmetadata)
     >>>
     >>> # if these data are not wanted, delete them:
-    >>> doc._delXmlMetadata()
+    >>> doc.del_xml_metadata()

docs/functions.rst

@@ -410,7 +410,7 @@ Yet others are handy, general-purpose utilities.
 
    .. method:: Document.xml_metadata_xref()
 
-      Return the XML-based metadata :data:`xref` of the PDF if present -- also refer to :meth:`Document._delXmlMetadata`. You can use it to retrieve the content via :meth:`Document.xrefStream` and then work with it using some XML software.
+      Return the XML-based metadata :data:`xref` of the PDF if present -- also refer to :meth:`Document.del_xml_metadata`. You can use it to retrieve the content via :meth:`Document.xrefStream` and then work with it using some XML software.
 
       :rtype: int
       :returns: :data:`xref` of PDF file level XML metadata -- or 0 if none exists.