Auto merge of #67540 - Mark-Simulacrum:fmt-the-world, r=Centril

Format the world

This PR modifies the formatting infrastructure a bit in the first commit (to enable the forgotten 2018 edition), as well as removes most directories from the ignore list in rustfmt.toml. It then follows that up with the second commit which runs `x.py fmt` and formats the entire repository.

We continue to not format the test directory (`src/test`) because of interactions with pretty printing and, in part, because re-blessing all of those files is somewhat harder to review, so is best suited for a follow up PR in my opinion.

1 files changed, 9 insertions, 6 deletions

diff --git a/src/libsyntax/util/node_count.rs b/src/libsyntax/util/node_count.rs
index 3db9955d304..e768ab4c648 100644
--- a/src/libsyntax/util/node_count.rs
+++ b/src/libsyntax/util/node_count.rs
@@ -1,7 +1,7 @@
 // Simply gives a rought count of the number of nodes in an AST.
 
-use crate::visit::*;
 use crate::ast::*;
+use crate::visit::*;
 use syntax_pos::Span;
 
 pub struct NodeCounter {
@@ -10,9 +10,7 @@ pub struct NodeCounter {
 
 impl NodeCounter {
     pub fn new() -> NodeCounter {
-        NodeCounter {
-            count: 0,
-        }
+        NodeCounter { count: 0 }
     }
 }
 
@@ -97,8 +95,13 @@ impl<'ast> Visitor<'ast> for NodeCounter {
         self.count += 1;
         walk_struct_field(self, s)
     }
-    fn visit_enum_def(&mut self, enum_definition: &EnumDef,
-                      generics: &Generics, item_id: NodeId, _: Span) {
+    fn visit_enum_def(
+        &mut self,
+        enum_definition: &EnumDef,
+        generics: &Generics,
+        item_id: NodeId,
+        _: Span,
+    ) {
         self.count += 1;
         walk_enum_def(self, enum_definition, generics, item_id)
     }