Parse as .kt file by default

_my/gen/generated/KotlinParser.java

diff --git a/_my/gen/generated/KotlinParser.java b/_my/gen/generated/KotlinParser.java
index 48dcc05..8a11e46 100644
--- a/_my/gen/generated/KotlinParser.java
+++ b/_my/gen/generated/KotlinParser.java
@@ -5252,9 +5252,9 @@
   }
 
   /* ********************************************************** */
-  // scriptFile
+  // kotlinFile
   static boolean root(PsiBuilder builder_, int level_) {
-    return scriptFile(builder_, level_ + 1);
+    return kotlinFile(builder_, level_ + 1);
   }
 
   /* ********************************************************** */

_my/src/grammar.bnf

diff --git a/_my/src/grammar.bnf b/_my/src/grammar.bnf
index 499b12c..ac3babb 100644
--- a/_my/src/grammar.bnf
+++ b/_my/src/grammar.bnf
@@ -14,8 +14,8 @@
 // ----- Syntax -----
 
 root ::=
-  //kotlinFile
-  scriptFile
+  kotlinFile
+  //scriptFile
 
 // start
 private kotlinFile