add NEWS entry for JuliaLang#11891

NEWS.md

@@ -340,6 +340,22 @@ Library improvements
 Deprecated or removed
 ---------------------
 
+ * several syntax whitespace insensitivities have been deprecated ([#11891]).
+ ```julia
+ # function call
+ f (x)
+
+ # getindex
+ x [17]
+ rand(2) [1]
+
+ # function definition
+ f (x) = x^2
+ function foo (x)
+ x^2
+ end
+ ```
+
  * indexing with Reals that are not subtypes of Integers (Rationals, FloatingPoint, etc.) has been deprecated ([#10458]).
 
  * `push!(A)` has been deprecated, use `append!` instead of splatting arguments to `push!` ([#10400]).
@@ -1487,4 +1503,5 @@ Too numerous to mention.
 [#11379]: https://github.com/JuliaLang/julia/issues/11379
 [#11432]: https://github.com/JuliaLang/julia/issues/11432
 [#11741]: https://github.com/JuliaLang/julia/issues/11741
+[#11891]: https://github.com/JuliaLang/julia/issues/11891
 [#11922]: https://github.com/JuliaLang/julia/issues/11922