Fill missing information about the normalisation argument in diagMetric's header

Utilities/Generic/MATLAB/Functions/diagMetric.m

@@ -31,11 +31,14 @@
 %                                           Frobenius norm.
 %                                           [Default: "Fro"].
 % 
-% normalise [logical] (Optional): Whether to normalise the result with the
-%                                 norm of the matrix. This will provide a
-%                                 results between 0, when all the elements
-%                                 along the diagonal are zero and 1 when
-%                                 the matrix is diagonal.
+% normalise [logical/numeric] (Optional): Whether to normalise the result
+%                                         with the norm of the matrix. This
+%                                         will provide a results between 0,
+%                                         when all the elements along the
+%                                         diagonal are zero and 1 when the
+%                                         matrix is diagonal. The value of
+%                                         the argument will be converted to
+%                                         logical. [Default: true].
 % 
 % --------------------------------------------------
 % Output