Docs typo fixed from lintig

Author: henryiii

docs/advanced/pycpp/utilities.rst

@@ -31,6 +31,7 @@ not play well with Python's standard `sys.stdout` and `sys.stderr` redirection.
 This can be fixed using a guard around the library function that has output:
 
 .. code-block:: cpp
+
     // At beginning of file
     #include <pybind11/iostream.h>
 
@@ -51,6 +52,7 @@ in realtime, such as to a Jupyter notebook.
 A global method to redirect for the lifetime of the module:
 
 .. code-block:: cpp
+
     m.attr("redirect_output") = py::capsule(new py::scoped_output_redirect(...),
     [](void *sor) { delete static_cast<py::scoped_output_redirect *>(sor); });