Update Wiki URLs to point to GitLab

This moves all URL references to Trac Wiki to their corresponding
GitLab counterparts.

This substitution is classified as follows:

1. Automated substitution using sed with Ben's mapping rule [1]
    Old: ghc.haskell.org/trac/ghc/wiki/XxxYyy...
    New: gitlab.haskell.org/ghc/ghc/wikis/xxx-yyy...

2. Manual substitution for URLs containing `#` index
    Old: ghc.haskell.org/trac/ghc/wiki/XxxYyy...#Zzz
    New: gitlab.haskell.org/ghc/ghc/wikis/xxx-yyy...#zzz

3. Manual substitution for strings starting with `Commentary`
    Old: Commentary/XxxYyy...
    New: commentary/xxx-yyy...

See also !539

[1]: https://gitlab.haskell.org/bgamari/gitlab-migration/blob/master/wiki-mapping.json

4 files changed, 4 insertions, 4 deletions

diff --git a/testsuite/README.md b/testsuite/README.md
index 278a668e86..3032c73979 100644
--- a/testsuite/README.md
+++ b/testsuite/README.md
@@ -44,4 +44,4 @@ The various ways that GHC supports are defined in `config/ghc`
 
 Please see the more extensive documentation [here][1].
 
-  [1]: http://ghc.haskell.org/trac/ghc/wiki/Building/RunningTests
+  [1]: https://gitlab.haskell.org/ghc/ghc/wikis/building/running-tests
diff --git a/testsuite/driver/README.md b/testsuite/driver/README.md
index 9324fd3df6..a6646ae37f 100644
--- a/testsuite/driver/README.md
+++ b/testsuite/driver/README.md
@@ -130,4 +130,4 @@ you checkout that commit and run the testsuite (or test).
     * Additionally, one will want to look at `compile_and_run`, `simple_run`,
       and `simple_build` in testutil.py
 
-  [1]: http://ghc.haskell.org/trac/ghc/wiki/Building/RunningTests
+  [1]: https://gitlab.haskell.org/ghc/ghc/wikis/building/running-tests
diff --git a/testsuite/tests/deriving/should_fail/T11509_1.hs b/testsuite/tests/deriving/should_fail/T11509_1.hs
index 369f51ad39..d684e64fc9 100644
--- a/testsuite/tests/deriving/should_fail/T11509_1.hs
+++ b/testsuite/tests/deriving/should_fail/T11509_1.hs
@@ -17,7 +17,7 @@ import GHC.StaticPtr
 {-------------------------------------------------------------------------------
   Standard Cloud-Haskell-like infrastructure
 
-  See <https://ghc.haskell.org/trac/ghc/wiki/TypeableT> for a dicussion of 'SC'.
+  See <https://gitlab.haskell.org/ghc/ghc/wikis/typeable-t> for a dicussion of 'SC'.
 -------------------------------------------------------------------------------}
 
 class Serializable a -- empty class, just for demonstration purposes
diff --git a/testsuite/tests/typecheck/should_compile/TcCoercibleCompile.hs b/testsuite/tests/typecheck/should_compile/TcCoercibleCompile.hs
index 96220897e0..49ad7bb5b2 100644
--- a/testsuite/tests/typecheck/should_compile/TcCoercibleCompile.hs
+++ b/testsuite/tests/typecheck/should_compile/TcCoercibleCompile.hs
@@ -5,7 +5,7 @@ import Data.Coerce
 import Data.Proxy
 import Data.Monoid (First(First)) -- check whether the implicit use of First is noted
 
--- see https://ghc.haskell.org/trac/ghc/wiki/Design/NewCoercibleSolver/V2
+-- see https://gitlab.haskell.org/ghc/ghc/wikis/design/new-coercible-solver/v2
 
 foo1 :: f a -> f a
 foo1 = coerce