Add EditorConfig rules, fix trailing whitespaces

src/nix/hive/eval.nix

@@ -316,7 +316,7 @@ let
     else {};
 
   # The final hive will always have the meta key instead of network.
-  hive = let 
+  hive = let
     userMeta = (lib.modules.evalModules {
       modules = [ metaOptions uncheckedUserMeta ];
     }).config;

src/nix/hive/mod.rs

@@ -400,7 +400,7 @@ impl<'hive> NixInstantiate<'hive> {
 /// to generate Nix expressions directly or escaping a JSON string to strip
 /// off Nix interpolation.
 struct SerializedNixExpresssion {
-    json_file: TempPath, 
+    json_file: TempPath,
 }
 
 impl SerializedNixExpresssion {

src/nix/host/mod.rs

@@ -106,7 +106,7 @@ pub trait Host: Send + Sync + std::fmt::Debug {
     /// If `require_ownership` is false, then the ownership of a key
     /// will not be applied if the specified user/group does not
     /// exist.
-    #[allow(unused_variables)] 
+    #[allow(unused_variables)]
     async fn upload_keys(&mut self, keys: &HashMap<String, Key>, require_ownership: bool) -> ColmenaResult<()> {
         Err(ColmenaError::Unsupported)
     }
@@ -127,7 +127,7 @@ pub trait Host: Send + Sync + std::fmt::Debug {
     }
 
     /// Runs an arbitrary command on the host.
-    #[allow(unused_variables)] 
+    #[allow(unused_variables)]
     async fn run_command(&mut self, command: &[&str]) -> ColmenaResult<()> {
         Err(ColmenaError::Unsupported)
     }