Abins broadening: Release notes

(And a typo in one of the test cases.)

docs/source/release/v4.3.0/indirect_geometry.rst

@@ -10,6 +10,21 @@ Indirect Geometry Changes
     improvements, followed by bug fixes.
 
 
+Improvements
+############
+
+- In Abins the instrumental broadening implementation has been overhauled.
+
+  - Output spectra from Abins should now be smooth and free of artefacts.
+  - A fast approximate scheme is implemented and automatically applied
+    when appropriate for simulations of TOSCA spectra. Alternative
+    broadening implementations may be selected through the
+    AbinsParameters system, including slow reference methods.
+  - Spectra now follow the broader Mantid convention for histograms:
+    values correspond to frequencies at the mid-points of the
+    histogram bins. (Previously the values would correspond to one
+    bin-edge.)
+
 BugFixes
 ########
 

scripts/test/Abins/AbinsBroadeningTest.py

@@ -59,7 +59,7 @@ class AbinsBroadeningTest(unittest.TestCase):
 
             self.assertAlmostEqual(sum(curve), 1)
 
-    def test_noraml_sum(self):
+    def test_normal_sum(self):
         """Check that normally-distributed kernel sums to unity"""
         # Note that unlike Gaussian kernel, this totals intensity 1 even with absurdly large bins