Fix a small typo in the docs (GH-26991)

srinivasreddy · web-flow · commit a79e2b6497f7 · 2021-07-03T11:04:57.000-03:00
diff --git a/Doc/c-api/memory.rst b/Doc/c-api/memory.rst
@@ -490,7 +490,7 @@ Customize Memory Allocators
 Debug hooks on the Python memory allocators
 ===========================================
 
-When :ref:`Python is built is debug mode <debug-build>`, the
+When :ref:`Python is built in debug mode <debug-build>`, the
 :c:func:`PyMem_SetupDebugHooks` function is called at the :ref:`Python
 preinitialization <c-preinit>` to setup debug hooks on Python memory allocators
 to detect memory errors.
