Feature some articles

Author: tfausak

content/issues/139.markdown

@@ -10,6 +10,38 @@ This is a weekly summary of what's going on in its community.
 
     > In which we implement a simple Datalog engine in not many lines of Haskell to understand its semantics.
 
+-   [Welcome to GitLab!](https://mail.haskell.org/pipermail/ghc-devs/2018-December/016716.html)
+
+    > I am happy to announce that CI on GHC's GitLab instance is now stable. At this point GitLab is to be considered the official upstream repository of GHC.
+
+-   [Stackage LTS 13 with ghc-8.6.3](https://www.stackage.org/blog/2018/12/announce-lts-13)
+
+    > We are pleased to announce the release of lts-13.0, the first in a new LTS Haskell snapshot series, using ghc-8.6.3.
+
+-   [Abstraction levels in functional programming](https://tzemanovic.gitlab.io/posts/abstraction-levels-in-functional-programming/)
+
+    > I am delighted to see more people learning functional programming and find the effort that goes into making it accessible to a wider audience encouraging.
+
+-   [Advent of Haskell](https://medium.com/@mvaldesdeleon/advent-of-haskell-950d6408a729)
+
+    > Thoughts and lessons learned after using Haskell consistently for 25 days in a row.
+
+-   [Curses Pac-man game in Haskell](https://github.com/ajkavanagh/pacman/tree/b72468ed0519858288f35f1ae1b2cfb91516df4f)
+
+    > I wrote this as an exercise in improving my Haskell, which I started this year and for learning how to use lenses for a presentation I'm going to do for my local functional programming group.
+
+-   [Happy Haskell Programming for GHC 8.x](http://haskell.1045720.n5.nabble.com/Happy-Haskell-Programming-for-GHC-8-x-td5888460.html)
+
+    > I'm happy to announce that Happy Haskell Programming (HHP) version 0.0.0 has been released. In short, HHP is a fork from ghc-mod 4.1.6 and re-written for all GHC 8.x.
+
+-   [Rigid types and block arguments](https://typeclasses.com/news/2018-12-yearly-billing-regional-discounts)
+
+    > Rigid type variables: Understanding that phrase that shows up in your compile errors can help you learn more about the type system. BlockArguments: The fun new GHC extension stealing everyone's dollars.
+
+-   [Testing `distributed-process` apps using Hspec](https://filib.io/posts/2018-12-24-testing-distributed-process-apps-with-hspec.html)
+
+    > `distributed-process` is a Haskell library that brings Erlang-style concurrency to Haskell. Whilst developing an application at work that uses it, I found that there wasn't much material online describing how to test `distributed-process` applications.
+
 ## Jobs
 
 -   [Galois is Hiring!](https://galois.com/careers/) (ad)
@@ -18,22 +50,14 @@ This is a weekly summary of what's going on in its community.
 
 ## In brief
 
--   [Abstraction levels in functional programming](https://tzemanovic.gitlab.io/posts/abstraction-levels-in-functional-programming/)
--   [Advent of Haskell](https://medium.com/@mvaldesdeleon/advent-of-haskell-950d6408a729)
 -   [Balancing scans](https://doisinkidney.com/posts/2018-12-21-balancing-scans.html)
 -   [Compiling to categories 3: A bit cuter](http://www.philipzucker.com/compiling-to-categories-3-a-bit-cuter/)
--   [Curses Pac-man game in Haskell](https://github.com/ajkavanagh/pacman/tree/b72468ed0519858288f35f1ae1b2cfb91516df4f)
 -   [Fluent polymorphism with visible type applications](https://blog.sumtypeofway.com/fluent-polymorphism-with-visible-type-applications/)
 -   [Graphs are to categories as lists are to monoids](https://alhassy.github.io/PathCat/)
--   [Happy Haskell Programming for GHC 8.x](http://haskell.1045720.n5.nabble.com/Happy-Haskell-Programming-for-GHC-8-x-td5888460.html)
 -   [Open Season on Hylomorphisms](https://bartoszmilewski.com/2018/12/20/open-season-on-hylomorphisms/)
 -   [PureScript series now available](https://mmhaskell.com/blog/2018/12/24/purescript-series-now-available)
--   [Rigid types and block arguments](https://typeclasses.com/news/2018-12-yearly-billing-regional-discounts)
 -   [Solving planning problems with Fast Downward and Haskell](https://ocharles.org.uk/blog/posts/2018-12-25-fast-downward.html)
--   [Stackage LTS 13 with ghc-8.6.3](https://www.stackage.org/blog/2018/12/announce-lts-13)
--   [Testing `distributed-process` apps using Hspec](https://filib.io/posts/2018-12-24-testing-distributed-process-apps-with-hspec.html)
--   [Welcome to GitLab!](https://mail.haskell.org/pipermail/ghc-devs/2018-December/016716.html)
--   [Xiaolin Wu’s fast antialiased line drawing algorithm in Haskell](https://blog.rcook.org/blog/2018/xiaolin-wu-algorithm/)
+-   [Xiaolin Wu's fast antialiased line drawing algorithm in Haskell](https://blog.rcook.org/blog/2018/xiaolin-wu-algorithm/)
 -   [ZuriHac 2019 registration](https://zfoh.ch/zurihac2019/#registration)
 
 ## Package of the week