DOC: fix typo on API change note for stackrel

tacaswell · tacaswell · commit 1fa3727c6994 · 2020-09-20T18:32:12.000-04:00
diff --git a/doc/api/prev_api_changes/api_changes_3.1.0.rst b/doc/api/prev_api_changes/api_changes_3.1.0.rst
@@ -727,7 +727,7 @@ Mathtext changes
 
 Deprecations
 ~~~~~~~~~~~~
-- The ``\stackrel`` mathtext command hsa been deprecated (it behaved differently
+- The ``\stackrel`` mathtext command has been deprecated (it behaved differently
   from LaTeX's ``\stackrel``.  To stack two mathtext expressions, use
   ``\genfrac{left-delim}{right-delim}{fraction-bar-thickness}{}{top}{bottom}``.
 - The ``\mathcircled`` mathtext command (which is not a real TeX command)
