[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/clib/cArray.ml b/clib/cArray.ml
index bff796ac33..be59ae57d0 100644
--- a/clib/cArray.ml
+++ b/clib/cArray.ml
@@ -123,7 +123,7 @@ let equal_norefl cmp t1 t2 =
 
 let equal cmp t1 t2 =
   if t1 == t2 then true else equal_norefl cmp t1 t2
-    
+
 
 let is_empty array = Int.equal (Array.length array) 0