chore: import upstream snapshot with attribution

conformance/format/functions-blocks.0

@@ -0,0 +1,14 @@
+fn helper(value: i32) -> i32 {
+    if value == 0 {
+        return 1
+    } else {
+        return value
+    }
+}
+
+pub fn main() -> Void {
+    let count: i32 = helper(1)
+    while count != 0 {
+        break
+    }
+}

conformance/format/generics-static.0

@@ -0,0 +1,11 @@
+type Box<T: Type, static N: usize> {
+    items: [N]T,
+}
+
+fn first<T: Type, static N: usize>(box: ref<Box<T, N>>) -> T {
+    return box.items[0]
+}
+
+pub fn main() -> Void {
+    let value: Box<u8, 4> = Box { items: [1, 2, 3, 4] }
+}

conformance/format/match-expressions.0

@@ -0,0 +1,16 @@
+choice Event {
+    key: i32,
+    quit,
+}
+
+pub fn main() -> Void {
+    let event: Event = Event.key(7)
+    match event {
+        .key(code) {
+            expect (code == 7)
+        }
+        _ {
+            expect (false == true)
+        }
+    }
+}

conformance/format/messy.0

@@ -0,0 +1,3 @@
+pub fn main(world: World) -> Void raises {
+    check world.out.write("format me\n")
+}