Clarify logic for nan comparisons.

Some coding style cleanups in arraytypes.c.src.
Add documentation to release notes for 1.4.0.
Add documentation of sort order to the sort docstring.

1 files changed, 3 insertions, 0 deletions

diff --git a/doc/release/1.4.0-notes.rst b/doc/release/1.4.0-notes.rst
index 6a15e318b..e2df0322d 100644
--- a/doc/release/1.4.0-notes.rst
+++ b/doc/release/1.4.0-notes.rst
@@ -59,6 +59,9 @@ Enhancements
 
        Complex numbers with the same nan placements are sorted according to
        the non-nan part if it exists.
+    #. The type comparison functions have been made consistent with the new
+       sort order of nans. Searchsorted now works with sorted arrays
+       containing nan values.
     #. Complex division has been made more resistent to overflow.
     #. Complex floor division has been made more resistent to overflow.