Tests: reset .ocamlformat using profile=default (#2124)

Dune 2 and dune 3 implement cram tests slightly differently. In dune 3,
a `.git` directory is added so that executables that rely on git work
properly.

Without this (in dune 2), ocamlformat walks up the directory structure
and applies 2 files: the `.ocamlformat` file at the project root (the
one used for ocamlformat itself) and the empty ones that are touched in
each cram test. Merging this is equivalent to the exterior one.

In dune 3, only the empty one is used. This makes a difference in the
`repl_file_errors.t` test.

The dune 3 behavior is the intended one. This commit fixes the "reset"
strategy to use instead `profile=default` (which will properly override
the external file) and makes the test suite compatible with dune 2 and
dune 3.

Author: emillon

Diff for: dune-project

@@ -40,10 +40,6 @@
   (cmdliner
    (>= 1.1.0))
   dune
-  (dune
-   (and
-    :with-test
-    (< 3.0)))
   dune-build-info
   either
   fix

Diff for: ocamlformat.opam

@@ -13,7 +13,6 @@ depends: [
   "base" {>= "v0.12.0"}
   "cmdliner" {>= "1.1.0"}
   "dune" {>= "2.8"}
-  "dune" {with-test & < "3.0"}
   "dune-build-info"
   "either"
   "fix"

Diff for: test/cli/bad_kind.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
   $ echo 'module X : S' > a.mli
 

Diff for: test/cli/check.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
   $ echo 'let x = 1' > a.ml
   $ ocamlformat --check a.ml

Diff for: test/cli/debug.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
   $ cat > a.ml << EOF
   > (* Intentionally not formatted *)

Diff for: test/cli/deprecated_option.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
   $ echo 'let x = y' > a.ml
 

Diff for: test/cli/large_string.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
   $ echo "let _ = \"$(printf '%*s' 300000 | sed 's/ /_ _/g')\"" > a.ml
 

Diff for: test/cli/max_iters.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
   $ echo 'let x = 1' > a.ml
   $ ocamlformat --max-iters=1 a.ml

Diff for: test/cli/name.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
   $ echo 'let x =     1' > a.ml
   $ ocamlformat --name a.cpp a.ml

Diff for: test/cli/repl_file_errors.t/run.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
 Make sure the locations of errors in repl files are right.
 
@@ -27,5 +27,5 @@ Make sure the locations of errors in repl files are right.
   [1]
 
   $ ocamlformat --repl-file empty_line_begin.repl
-  # foo bar ;;
+  # foo bar;;
   - : 0

Diff for: test/cli/stdin.t

@@ -1,4 +1,4 @@
-  $ touch .ocamlformat
+  $ echo profile=default > .ocamlformat
 
 One of '--impl', '--intf' or '--name' is required when the input is read from stdin: