fix spelling

Author: waylan

docs/changelog.md

@@ -14,9 +14,10 @@ See the [Contributing Guide](contributing.md) for details.
 
 ### Changed
 
-* Footnotes are now ordered by the occurrence of their references in the document.
-  A new config option for `footnotes`, `USE_DEFINITION_ORDER`, has been added to support
-  restoring the previous behavior of ordering footnotes by the occurrence of definitions.
+* Footnotes are now ordered by the occurrence of their references in the
+  document. A new configuration option for the footnotes extension,
+  `USE_DEFINITION_ORDER`, has been added to support restoring the previous
+  behavior of ordering footnotes by the occurrence of definitions.
 
 ### Fixed
 

docs/extensions/footnotes.md

@@ -106,11 +106,11 @@ The following options are provided to configure the output:
     The text string used to set the footnote separator. Defaults to `:`.
 
 * **`USE_DEFINITION_ORDER`**:
-    Whether to order footnotes by the occurence of footnote definitions
+    Whether to order footnotes by the occurrence of footnote definitions
     in the document. Defaults to `False`.
 
     Introduced in version 3.9.0, this option allows footnotes to be ordered
-    by the occurence of their definitions in the document, rather than by the
+    by the occurrence of their definitions in the document, rather than by the
     order of their references in the text. This was the behavior of
     previous versions of the extension.
 

tests/test_syntax/extensions/test_footnotes.py

@@ -402,7 +402,7 @@ def test_footnote_order_tricky(self):
         )
 
     def test_footnote_order_by_definition(self):
-        """Test that footnotes occur in order of definition occurence when so configured."""
+        """Test that footnotes occur in order of definition occurrence when so configured."""
 
         self.assertMarkdownRenders(
             self.dedent(