[coq] Untabify the whole ML codebase.

We also remove trailing whitespace.

Script used:

```bash
for i in `find . -name '*.ml' -or -name '*.mli' -or -name '*.mlg'`; do expand -i "$i" | sponge "$i"; sed -e's/[[:space:]]*$//' -i.bak "$i"; done
```

1 files changed, 1 insertions, 1 deletions

diff --git a/stm/workerPool.ml b/stm/workerPool.ml
index f77ced2f3a..d82741576e 100644
--- a/stm/workerPool.ml
+++ b/stm/workerPool.ml
@@ -88,7 +88,7 @@ let rec create_worker extra pool priority id =
   let cpanel = { exit; cancelled; extra } in
   let manager = CThread.create (Model.manager cpanel) worker in
   { name; cancel; manager; process }
-  
+
 and cleanup x priority = locking x begin fun { workers; count; extra_arg } ->
   workers := List.map (function
     | { cancel } as w when !cancel = false -> w