NEWS.md: various minor fixes

fix typo, correct link markup, add space after commas, fix a PR reference

NEWS.md

@@ -4,7 +4,7 @@ Julia v0.5.0 Release Notes
 New language features
 ---------------------
 
-  * Generator expressions, e.g. `f(i) for i in 1:n` (#4470). This returns an iterator
+  * Generator expressions, e.g. `f(i) for i in 1:n` ([#4470]). This returns an iterator
     that computes the specified values on demand.
 
   * Macro expander functions are now generic, so macros can have multiple definitions
@@ -40,7 +40,7 @@ Language changes
   * `A <: B` is parsed as `Expr(:(<:), :A, :B)` in all cases ([#9503]). This also applies to the
     `>:` operator.
 
-  * Simple 2-argument comparisons like `A < B` are parsed as calls intead of using the
+  * Simple 2-argument comparisons like `A < B` are parsed as calls instead of using the
     `:comparison` expression type.
 
   * The `if` keyword cannot be followed immediately by a line break ([#15763]).
@@ -131,10 +131,10 @@ Library improvements
       vector instead of a one-column sparse matrix. ([#13440])
 
     * Rank one update and downdate functions, `lowrankupdate`, `lowrankupdate!`, `lowrankdowndate`,
-    and `lowrankdowndate!`, for dense Cholesky factorizations ([#14243],[#14424])
+    and `lowrankdowndate!`, for dense Cholesky factorizations ([#14243], [#14424])
 
     * All `sparse` methods now retain provided numerical zeros as structural nonzeros; to
-      drop numerical zeros, use `dropzeros!` ([#14798],[#15242]).
+      drop numerical zeros, use `dropzeros!` ([#14798], [#15242]).
 
   * New `foreach` function for calling a function on every element of a collection when
     the results are not needed.
@@ -181,6 +181,7 @@ Deprecated or removed
 <!--- generated by NEWS-update.jl: -->
 [#4163]: https://github.com/JuliaLang/julia/issues/4163
 [#4211]: https://github.com/JuliaLang/julia/issues/4211
+[#4470]: https://github.com/JuliaLang/julia/issues/4470
 [#6190]: https://github.com/JuliaLang/julia/issues/6190
 [#8036]: https://github.com/JuliaLang/julia/issues/8036
 [#8846]: https://github.com/JuliaLang/julia/issues/8846
@@ -215,7 +216,7 @@ Deprecated or removed
 [#15242]: https://github.com/JuliaLang/julia/issues/15242
 [#15258]: https://github.com/JuliaLang/julia/issues/15258
 [#15409]: https://github.com/JuliaLang/julia/issues/15409
-[#15430]: https://github.com/JuliaLang/julia/issues/15431
+[#15431]: https://github.com/JuliaLang/julia/issues/15431
 [#15550]: https://github.com/JuliaLang/julia/issues/15550
 [#15609]: https://github.com/JuliaLang/julia/issues/15609
 [#15763]: https://github.com/JuliaLang/julia/issues/15763