fmt: multi-line map formatting

[sagikazarmark]

This PR changes map formatting, so they are formatted the same way as lists.

[vito]

Thanks! Agree with these rules in general, but I'm getting this diff, which I think is less nice - could we keep an exception for single-list/map-arg so the brackets don't get their own line?

diff --git a/.dagger/main.dang b/.dagger/main.dang
index e3a3a5f0..ad3e2b59 100644
--- a/.dagger/main.dang
+++ b/.dagger/main.dang
@@ -69,14 +69,16 @@ type Dang {
   fmt: Changeset! {
     base
       .withFile("/usr/bin/dang", binary)
-      .withExec([
-        "bash", "-c",
-        """
-        find . -name '*.dang' | while read f; do
-          dang fmt -lw "$f" || echo "skipping unparseable file: $f" >&2
-        done
-        """,
-      ])
+      .withExec(
+        [
+          "bash", "-c",
+          """
+          find . -name '*.dang' | while read f; do
+            dang fmt -lw "$f" || echo "skipping unparseable file: $f" >&2
+          done
+          """,
+        ],
+      )
       .directory(".")
       .changes(base.directory("."))
   }

A dagger generate -y to apply these in the same PR will also fix the check and make these easier to spot in review.

[sagikazarmark]

Hm, yeah, makes sense, but I used the List code as an example. I'll check if it has this issue as well.