feat: brace like after pattern entry

CHANGELOG.md

@@ -91,6 +91,18 @@ Types of changes
   +   _
   ```
 
+- Brace-like elements after a pattern entry now follow the exclamation mark:
+
+  ```diff
+  -  rootPoolProperties ?
+  -    {
+  -      autoexpand = "on";
+  -    },
+  +  rootPoolProperties ? {
+  +    autoexpand = "on";
+  +  },
+  ```
+
 ## [0.2.0] - 2022-02-17
 
 ### Added

src/rules/pat_entry.rs

@@ -63,23 +63,33 @@ pub fn rule(
 
         // expr
         let child = children.get_next().unwrap();
-        let single_line = crate::builder::fits_in_single_line(
+        let mut dedent = false;
+
+        if comment {
+            steps.push_back(crate::builder::Step::NewLine);
+            steps.push_back(crate::builder::Step::Pad);
+        } else if matches!(
+            child.element.kind(),
+            rnix::SyntaxKind::NODE_ATTR_SET
+                | rnix::SyntaxKind::NODE_IDENT
+                | rnix::SyntaxKind::NODE_PAREN
+                | rnix::SyntaxKind::NODE_LAMBDA
+                | rnix::SyntaxKind::NODE_LET_IN
+                | rnix::SyntaxKind::NODE_LIST
+                | rnix::SyntaxKind::NODE_LITERAL
+                | rnix::SyntaxKind::NODE_STRING,
+        ) || crate::builder::fits_in_single_line(
             build_ctx,
             child.element.clone(),
-        );
-
-        if single_line {
-            if comment {
-                steps.push_back(crate::builder::Step::NewLine);
-                steps.push_back(crate::builder::Step::Pad);
-            } else {
-                steps.push_back(crate::builder::Step::Whitespace);
-            }
+        ) {
+            steps.push_back(crate::builder::Step::Whitespace);
         } else {
+            dedent = true;
             steps.push_back(crate::builder::Step::Indent);
             steps.push_back(crate::builder::Step::NewLine);
             steps.push_back(crate::builder::Step::Pad);
         }
+
         match layout {
             crate::config::Layout::Tall => {
                 steps.push_back(crate::builder::Step::FormatWider(
@@ -90,7 +100,7 @@ pub fn rule(
                 steps.push_back(crate::builder::Step::Format(child.element));
             }
         }
-        if !single_line {
+        if dedent {
             steps.push_back(crate::builder::Step::Dedent);
         }
     }

tests/cases/pattern/in

@@ -9,6 +9,16 @@
     gomod2nix,
     mach-nix,
   }@inp: _)
+  ({
+    a ? [
+      1
+      2
+      3
+    ],
+    b ? {
+      # ...
+    }
+  }: _)
   ({}: _)
   ({ a }: _)
   ({ /**/ }: _)

tests/cases/pattern/out

@@ -11,6 +11,17 @@
     mach-nix,
   } @ inp:
     _)
+  ({
+    a ? [
+      1
+      2
+      3
+    ],
+    b ? {
+      # ...
+    },
+  }:
+    _)
   ({}: _)
   ({a}: _)
   ({