fix syntax in README.rst

README.rst

@@ -176,10 +176,10 @@ kwargs
    (see `PR #76 <https://github.com/zerwes/hiyapyco/pull/76>`_.)
 
 -  ``loader_callback``: optional custom callback function to load yaml files.
-    The callback function shall behave like ``yaml.load_all`` from PyYAML,
-    taking a IO stream as input and returning a list of objects.
-    Using this method, for example `ruamel <https://pypi.org/project/ruamel.yaml/>`_
-    can be used instead of PyYAML etc.
+   The callback function shall behave like ``yaml.load_all`` from PyYAML,
+   taking a IO stream as input and returning a list of objects.
+   Using this method, for example `ruamel <https://pypi.org/project/ruamel.yaml/>`_
+   can be used instead of PyYAML etc.
 
 interpolation
 ~~~~~~~~~~~~~