fix: trim source before lint

Author: zdm

lib/lint/file.js

@@ -441,6 +441,14 @@ export class LintFile {
                     : true,
             } );
 
+        // trim
+        // important for javascript sheband
+        if ( editorConfig ) {
+            if ( editorConfig.trim ) {
+                this.#data = this.#data.trim();
+            }
+        }
+
         var res;
 
         // markdown