[whitespace] ocp-indent the code

Summary:
This commit is the result of
`find infer/src -name '*.ml' -or -name '*.mli' -exec ocp-indent -i \{\} \;`
and
`INFER_CHECK_COPYRIGHT=1 InferPrint`

infer/src/backend/checkCopyright.ml

@@ -208,7 +208,7 @@ let check_copyright () =
                   | None ->
                       L.stderr "Can't find fb year: %s@." fname
                   | Some fb_year ->
-                      let prefix = "" in
+                      let prefix = if com_style = comment_style_ocaml then " " else "" in
                       if copyright_has_changed mono fb_year com_style prefix cstart cend lines_arr then
                         begin
                           let range = cend - cstart in