use field init shorthand EVERYWHERE

Like rust-lang#43008 (f668999), but _much more aggressive_.

Author: zackmdavis

src/bootstrap/builder.rs

@@ -193,7 +193,7 @@ pub struct ShouldRun<'a> {
 impl<'a> ShouldRun<'a> {
     fn new(builder: &'a Builder) -> ShouldRun<'a> {
         ShouldRun {
-            builder: builder,
+            builder,
             paths: BTreeSet::new(),
             is_really_default: true, // by default no additional conditions
         }
@@ -278,9 +278,9 @@ impl<'a> Builder<'a> {
         };
 
         let builder = Builder {
-            build: build,
+            build,
             top_stage: build.config.stage.unwrap_or(2),
-            kind: kind,
+            kind,
             cache: Cache::new(),
             stack: RefCell::new(Vec::new()),
         };
@@ -309,9 +309,9 @@ impl<'a> Builder<'a> {
         };
 
         let builder = Builder {
-            build: build,
+            build,
             top_stage: build.config.stage.unwrap_or(2),
-            kind: kind,
+            kind,
             cache: Cache::new(),
             stack: RefCell::new(Vec::new()),
         };

src/bootstrap/check.rs

@@ -872,7 +872,7 @@ impl Step for CrateLibrustc {
             builder.ensure(CrateLibrustc {
                 compiler,
                 target: run.target,
-                test_kind: test_kind,
+                test_kind,
                 krate: name,
             });
         };
@@ -934,8 +934,8 @@ impl Step for Crate {
             builder.ensure(Crate {
                 compiler,
                 target: run.target,
-                mode: mode,
-                test_kind: test_kind,
+                mode,
+                test_kind,
                 krate: name,
             });
         };