Manual: fix typo

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Manual: fix typo
7e894404 · Sébastien Villemot · ed9f8a34 · 7e894404
Verified Commit 7e894404 authored 6 months ago by Sébastien Villemot
--- a/doc/manual/source/the-model-file.rst
+++ b/doc/manual/source/the-model-file.rst
@@ -2051,7 +2051,7 @@ in this case ``initval`` is used to specify the terminal conditions.
  
    .. option:: last_obs = {INTEGER | DATE}
  
-        The observaton number or the date (see
+        The observation number or the date (see
 	:ref:`dates-members`) of the last observation to be used in
 	the file.