Minor fix

Author: AnGREATern

src/logging/json.rs

@@ -1,6 +1,6 @@
 //! Custom JSON formatter and writer for use in logging.
 
-use std::{borrow::Cow, collections::BTreeMap, fmt, io, env, sync::LazyLock, marker::PhantomData};
+use std::{borrow::Cow, collections::BTreeMap, env, fmt, io, marker::PhantomData, sync::LazyLock};
 
 use regex::Regex;
 use serde::{ser::SerializeMap, Deserialize, Serialize, Serializer};
@@ -17,9 +17,8 @@ use tracing_subscriber::{
     registry::{LookupSpan, SpanRef},
 };
 
-static ENV_VAR_REGEX: LazyLock<Regex> = LazyLock::new(|| {
-    Regex::new(r"\$([A-Za-z_][A-Za-z0-9_]*)").unwrap()
-});
+static ENV_VAR_REGEX: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"\$([A-Za-z_][A-Za-z0-9_]*)").unwrap());
 
 /// Custom names JSON keys.
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
@@ -439,13 +438,19 @@ impl<T> ExtensibleJsonFormat<T> {
     }
 
     /// Add static fields to generated JSON objects.
-    pub(crate) fn with_static_fields(self, mut static_fields: BTreeMap<String, Value>, parse_env: bool) -> Self {
+    pub(crate) fn with_static_fields(
+        self,
+        mut static_fields: BTreeMap<String, Value>,
+        parse_env: bool,
+    ) -> Self {
         if parse_env {
             let expand_env_vars = |input: &str| -> Value {
-                ENV_VAR_REGEX.replace_all(input, |caps: &regex::Captures<'_>| {
-                    let var_name = &caps[1];
-                    env::var(var_name).unwrap_or_else(|_| format!("${}", var_name))
-                }).into()
+                ENV_VAR_REGEX
+                    .replace_all(input, |caps: &regex::Captures<'_>| {
+                        let var_name = &caps[1];
+                        env::var(var_name).unwrap_or_else(|_| format!("${}", var_name))
+                    })
+                    .into()
             };
 
             for val in static_fields.values_mut() {