Change name Scratch_Scope to Scoped_Arena

base_arena.cpp

@@ -130,12 +130,12 @@ arena_from_buffer(void *buffer, size_t size) {
     return result;
 }
 
-struct Scratch_Scope {
+struct Scoped_Arena {
     Arena *arena;
     int pos;
-    Scratch_Scope(Arena *arena) {
+    Scoped_Arena(Arena *arena) {
         this->arena = arena;
         this->pos = arena->len;
     }
-    ~Scratch_Scope() { this->arena->len = this->pos; }
+    ~Scoped_Arena() { this->arena->len = this->pos; }
 };