doc: clarify news, clarify TTH_GRID

Author: yucongalicechen

news/utils-updates.rst

@@ -4,7 +4,7 @@
 
 **Changed:**
 
-* Updated functions related to changes in `diffpy.utils` version 3.6.0.
+* Functions related to diffraction_objects and tools modules in `diffpy.utils` to reflect changes in version 3.6.0.
 
 **Deprecated:**
 

src/diffpy/labpdfproc/functions.py

@@ -11,7 +11,7 @@
 N_POINTS_ON_DIAMETER = 300
 TTH_GRID = np.arange(1, 180.1, 0.1)
 # Round down the last element if it's slightly above 180 due to floating point precision
-TTH_GRID[-1] = 180
+TTH_GRID[-1] = 180.00
 CVE_METHODS = ["brute_force", "polynomial_interpolation"]
 
 # pre-computed datasets for polynomial interpolation (fast calculation)