pythongh-126624: Expose error code XML_ERROR_NOT_STARTED of Expat >=2.6.4 (python#126625)

Expose error code ``XML_ERROR_NOT_STARTED`` in `xml.parsers.expat.errors` which was
introduced in Expat 2.6.4.


Co-authored-by: Bénédikt Tran <[email protected]>

Author: hartwork

Doc/library/pyexpat.rst

@@ -941,6 +941,13 @@ The ``errors`` module has the following attributes:
    has been breached.
 
 
+.. data:: XML_ERROR_NOT_STARTED
+
+   The parser was tried to be stopped or suspended before it started.
+
+   .. versionadded:: next
+
+
 .. rubric:: Footnotes
 
 .. [1] The encoding string included in XML output should conform to the

Misc/NEWS.d/next/Library/2024-11-09-15-59-51.gh-issue-126624.bN53Va.rst

@@ -0,0 +1,2 @@
+Expose error code :data:`~xml.parsers.expat.errors.XML_ERROR_NOT_STARTED`
+of Expat >=2.6.4 in :mod:`xml.parsers.expat.errors`.

Modules/pyexpat.c

@@ -1767,7 +1767,10 @@ struct ErrorInfo error_info_of[] = {
     {"XML_ERROR_NO_BUFFER", "a successful prior call to function XML_GetBuffer is required"},
 
     /* Added in 2.4.0. */
-    {"XML_ERROR_AMPLIFICATION_LIMIT_BREACH", "limit on input amplification factor (from DTD and entities) breached"}
+    {"XML_ERROR_AMPLIFICATION_LIMIT_BREACH", "limit on input amplification factor (from DTD and entities) breached"},
+
+    /* Added in 2.6.4. */
+    {"XML_ERROR_NOT_STARTED", "parser not started"},
 };
 
 static int