Update rustfmt to 0.9.0.

cranelift/src/filetest/subtest.rs

@@ -66,25 +66,25 @@ pub trait SubTest {
 /// match 'inst10'.
 impl<'a> filecheck::VariableMap for Context<'a> {
     fn lookup(&self, varname: &str) -> Option<FCValue> {
-        self.details
-            .map
-            .lookup_str(varname)
-            .map(|e| FCValue::Regex(format!(r"\b{}\b", e).into()))
+        self.details.map.lookup_str(varname).map(|e| {
+            FCValue::Regex(format!(r"\b{}\b", e).into())
+        })
     }
 }
 
 /// Run filecheck on `text`, using directives extracted from `context`.
 pub fn run_filecheck(text: &str, context: &Context) -> Result<()> {
     let checker = build_filechecker(context)?;
-    if checker
-           .check(&text, context)
-           .map_err(|e| format!("filecheck: {}", e))? {
+    if checker.check(&text, context).map_err(
+        |e| format!("filecheck: {}", e),
+    )?
+    {
         Ok(())
     } else {
         // Filecheck mismatch. Emit an explanation as output.
-        let (_, explain) = checker
-            .explain(&text, context)
-            .map_err(|e| format!("explain: {}", e))?;
+        let (_, explain) = checker.explain(&text, context).map_err(
+            |e| format!("explain: {}", e),
+        )?;
         Err(format!("filecheck failed:\n{}{}", checker, explain))
     }
 }
@@ -94,14 +94,14 @@ pub fn build_filechecker(context: &Context) -> Result<Checker> {
     let mut builder = CheckerBuilder::new();
     // Preamble comments apply to all functions.
     for comment in context.preamble_comments {
-        builder
-            .directive(comment.text)
-            .map_err(|e| format!("filecheck: {}", e))?;
+        builder.directive(comment.text).map_err(|e| {
+            format!("filecheck: {}", e)
+        })?;
     }
     for comment in &context.details.comments {
-        builder
-            .directive(comment.text)
-            .map_err(|e| format!("filecheck: {}", e))?;
+        builder.directive(comment.text).map_err(|e| {
+            format!("filecheck: {}", e)
+        })?;
     }
     let checker = builder.finish();
     if checker.is_empty() {