minor: minor docstring edits

Author: astroC86

examples/plot_matrixmult.py

@@ -40,7 +40,7 @@
 
 ###############################################################################
 # We are now ready to create the input matrices :math:`\mathbf{A}` of size
-# :math:`M \times k` and :math:`\mathbf{A}` of size :math:`K \times N`.
+# :math:`M \times k` and :math:`\mathbf{X}` of size :math:`K \times N`.
 N, K, M = 4, 4, 4
 A = np.random.rand(N * K).astype(dtype=np.float32).reshape(N, K)
 X = np.random.rand(K * M).astype(dtype=np.float32).reshape(K, M)

examples/plot_summamatrixmult.py

@@ -32,7 +32,7 @@
 
 ###############################################################################
 # We set the seed such that all processes can create the input matrices filled
-# with the same random number. In practical application, such matrices will be
+# with the same random number. In practical applications, such matrices will be
 # filled with data that is appropriate to the use-case.
 np.random.seed(42)