Fix tidyverse#2429. Emphasise new manual_scale() behaviour in NEWS

Author: Anthony Chiu

NEWS.md

@@ -84,11 +84,11 @@
 
 * Increase the default `nbin` of `guide_colourbar()` to place the ticks more precisely (#3508, @yutannihilation).
 
-* Modified `manual_scale()` to match `values` with the order of `breaks`
-  whenever `values` is an unnamed vector. Previously, unnamed `values` would
-  match with the limits of the scale and ignore the order of any `breaks`
-  provided. Note that this may change the appearance of plots that previously
-  relied on the unordered behaviour (#2429, @idno0001).
+* `manual_scale()` now matches `values` with the order of `breaks` whenever
+  `values` is an unnamed vector. Previously, unnamed `values` would match with
+  the limits of the scale and ignore the order of any `breaks` provided. Note
+  that this may change the appearance of plots that previously relied on the
+  unordered behaviour (#2429, @idno0001).
 
 # ggplot2 3.2.1