diff --git a/crates/ra_ide/src/completion.rs b/crates/ra_ide/src/completion.rs
index 7b96902fbb8..a537b68b1f1 100644
--- a/crates/ra_ide/src/completion.rs
+++ b/crates/ra_ide/src/completion.rs
@@ -21,12 +21,13 @@ mod complete_trait_impl;
 mod unstable_feature_descriptor;
 use ra_ide_db::RootDatabase;
 
+#[rustfmt::skip]
 use crate::{
     completion::{
         completion_context::CompletionContext,
         completion_item::{CompletionKind, Completions},
 
-        //TODO: rework 
+        //TODO: cyclic imports caused by xtask generation, this should be better
         unstable_feature_descriptor::UNSTABLE_FEATURE_DESCRIPTOR,
         complete_attribute::LintCompletion,
     },
diff --git a/crates/ra_ide/src/completion/complete_attribute.rs b/crates/ra_ide/src/completion/complete_attribute.rs
index 50b0b3ff68e..2161cdfd211 100644
--- a/crates/ra_ide/src/completion/complete_attribute.rs
+++ b/crates/ra_ide/src/completion/complete_attribute.rs
@@ -19,9 +19,7 @@ pub(super) fn complete_attribute(acc: &mut Completions, ctx: &CompletionContext)
         (Some(path), Some(token_tree)) if path.to_string() == "derive" => {
             complete_derive(acc, ctx, token_tree)
         }
-        (Some(path), Some(token_tree))
-            if path.to_string() == "feature" =>
-        {
+        (Some(path), Some(token_tree)) if path.to_string() == "feature" => {
             complete_lint(acc, ctx, token_tree, UNSTABLE_FEATURE_DESCRIPTOR);
         }
         (Some(path), Some(token_tree))
@@ -169,7 +167,12 @@ fn complete_derive(acc: &mut Completions, ctx: &CompletionContext, derive_input:
     }
 }
 
-fn complete_lint(acc: &mut Completions, ctx: &CompletionContext, derive_input: ast::TokenTree, lints_completions: &[LintCompletion]) {
+fn complete_lint(
+    acc: &mut Completions,
+    ctx: &CompletionContext,
+    derive_input: ast::TokenTree,
+    lints_completions: &[LintCompletion],
+) {
     if let Ok(existing_lints) = parse_comma_sep_input(derive_input) {
         for lint_completion in lints_completions
             .into_iter()
diff --git a/xtask/src/codegen.rs b/xtask/src/codegen.rs
index 209caacc3d7..c7cac50fe88 100644
--- a/xtask/src/codegen.rs
+++ b/xtask/src/codegen.rs
@@ -26,7 +26,7 @@ pub use self::{
     gen_unstable_future_descriptor::generate_unstable_future_descriptor,
 };
 
-// Directory used by xtask 
+// Directory used by xtask
 const STORAGE: &str = ".xtask";
 
 const GRAMMAR_DIR: &str = "crates/ra_parser/src/grammar";
diff --git a/xtask/src/codegen/gen_unstable_future_descriptor.rs b/xtask/src/codegen/gen_unstable_future_descriptor.rs
index 6dce8ba0adc..75b603d7df5 100644
--- a/xtask/src/codegen/gen_unstable_future_descriptor.rs
+++ b/xtask/src/codegen/gen_unstable_future_descriptor.rs
@@ -1,23 +1,27 @@
 //! Generates descriptors structure for unstable feature from Unstable Book
 
-use crate::{
-    codegen::{self, project_root, Mode, Result},
-};
-use std::process::Command;
-use std::fs;
-use walkdir::WalkDir;
-use quote::quote;
 use crate::codegen::update;
+use crate::codegen::{self, project_root, Mode, Result};
+use quote::quote;
+use std::fs;
+use std::process::Command;
+use walkdir::WalkDir;
 
 pub fn generate_unstable_future_descriptor(mode: Mode) -> Result<()> {
     let path = project_root().join(codegen::STORAGE);
     fs::create_dir_all(path.clone())?;
 
     Command::new("git").current_dir(path.clone()).arg("init").output()?;
-    Command::new("git").current_dir(path.clone()).args(&["remote", "add", "-f", "origin", codegen::REPOSITORY_URL]).output()?;
-    Command::new("git").current_dir(path.clone()).args(&["sparse-checkout", "set", "/src/doc/unstable-book/src/"]).output()?;
+    Command::new("git")
+        .current_dir(path.clone())
+        .args(&["remote", "add", "-f", "origin", codegen::REPOSITORY_URL])
+        .output()?;
+    Command::new("git")
+        .current_dir(path.clone())
+        .args(&["sparse-checkout", "set", "/src/doc/unstable-book/src/"])
+        .output()?;
     Command::new("git").current_dir(path.clone()).args(&["pull", "origin", "master"]).output()?;
-    //TODO: check git, and do pull 
+    //TODO: check git, and do pull
 
     let src_dir = path.join("src/doc/unstable-book/src");
     let files = WalkDir::new(src_dir.join("language-features"))
@@ -26,18 +30,23 @@ pub fn generate_unstable_future_descriptor(mode: Mode) -> Result<()> {
         .filter_map(|e| e.ok())
         .filter(|entry| {
             // Get all `.md ` files
-            entry.file_type().is_file() && entry.path().extension().map(|ext| ext == "md").unwrap_or(false)
+            entry.file_type().is_file()
+                && entry.path().extension().map(|ext| ext == "md").unwrap_or(false)
+        })
+        .collect::<Vec<_>>();
+
+    let definitions = files
+        .iter()
+        .map(|entry| {
+            let path = entry.path();
+            let feature_ident =
+                format!("{}", path.file_stem().unwrap().to_str().unwrap().replace("-", "_"));
+            let doc = format!("{}", std::fs::read_to_string(path).unwrap());
+
+            quote! { LintCompletion { label: #feature_ident, description: #doc } }
         })
         .collect::<Vec<_>>();
 
-    let definitions = files.iter().map(|entry| {
-        let path = entry.path();
-        let feature_ident = format!("{}", path.file_stem().unwrap().to_str().unwrap().replace("-", "_"));
-        let doc = format!("{}", std::fs::read_to_string(path).unwrap() );
-       
-        quote!{ LintCompletion { label: #feature_ident, description: #doc } }
-    }).collect::<Vec<_>>();
-    
     let ts = quote! {
         use crate::completion::LintCompletion;
 
@@ -45,10 +54,10 @@ pub fn generate_unstable_future_descriptor(mode: Mode) -> Result<()> {
             #(#definitions),*
         ];
     };
-    
+
     let destination = project_root().join(codegen::UNSTABLE_FEATURE);
     let contents = crate::reformat(ts.to_string())?;
     update(destination.as_path(), &contents, mode)?;
 
     Ok(())
-}
\ No newline at end of file
+}