Prettier

src/ast.ts

       const rules: Array<string | EnvError> = this.children
         .filter((child) => child instanceof Rule)
         .map(
-        (child): string | EnvError => {
-          return child.compile(env, opts);
-        }
-      );
+          (child): string | EnvError => {
+            return child.compile(env, opts);
+          }
+        );
       const rulesError = rules.find((child) => child instanceof EnvError);
       if (rulesError !== undefined) return rulesError;
 
       const compiledRules = rules.join(lineSpacer);
 
       const children: Array<string | EnvError> = this.children
-      .filter((child) => child instanceof RuleSet).map(
-        (child): string | EnvError => {
-          return child.compile(env, opts);
-        }
-      );
+        .filter((child) => child instanceof RuleSet)
+        .map(
+          (child): string | EnvError => {
+            return child.compile(env, opts);
+          }
+        );
       const childrenError = children.find((child) => child instanceof EnvError);
       if (childrenError !== undefined) return childrenError;