Many issues in the wiki were unnecessarily links:
```
... patch posted in [\#1346](ghc#1346).
```
This rewrites these as `#1346` using
```bash
sed -i -r -e 's/\[\\#([0-9]+)\]\([^)]+\/\1\)/#\1/g' $(find -iname '*.md')
```
And manually eyeballing the result.

type-nats.md

 # Type Level Literals
 
 
-This page collects information on how to work with type-level literals, as implemented in the Haskell compiler GHC (ticket [\#4385](https://gitlab.haskell.org/ghc/ghc/issues/4385)).
+This page collects information on how to work with type-level literals, as implemented in the Haskell compiler GHC (ticket #4385).
 
 ## Status