Lint changes from William Rucklidge.
Change-Id: Ib468fbe7e0e8220870ddf9968ac59295c21f1e43
diff --git a/docs/source/nnls_solving.rst b/docs/source/nnls_solving.rst
index 8267a51..c2d2369 100644
--- a/docs/source/nnls_solving.rst
+++ b/docs/source/nnls_solving.rst
@@ -513,7 +513,7 @@
a :ref:`section-preconditioner` must be used to get reasonable
performance. Currently only the ``JACOBI`` preconditioner is available
for use with ``CGNR``. It uses the block diagonal of :math:`H` to
-preconditioner the normal equations.
+precondition the normal equations.
When the user chooses ``CGNR`` as the linear solver, Ceres
automatically switches from the exact step algorithm to an inexact
