Simplify ast_unparase.c further

Author: davepeck

Python/ast_unparse.c

@@ -663,27 +663,15 @@ build_ftstring_body(asdl_expr_seq *values, bool is_format_spec)
 }
 
 static int
-_write_values_subarray(PyUnicodeWriter *writer, asdl_expr_seq *values, Py_ssize_t first_idx,
-                       Py_ssize_t last_idx, char prefix, PyArena *arena)
+append_templatestr(PyUnicodeWriter *writer, expr_ty e)
 {
     int result = -1;
-
-    asdl_expr_seq *new_values = _Py_asdl_expr_seq_new(last_idx - first_idx + 1, arena);
-    if (!new_values) {
-        return result;
-    }
-
-    Py_ssize_t j = 0;
-    for (Py_ssize_t i = first_idx; i <= last_idx; ++i) {
-        asdl_seq_SET(new_values, j++, asdl_seq_GET(values, i));
-    }
-
-    PyObject *body = build_ftstring_body(new_values, false);
+    PyObject *body = build_ftstring_body(e->v.TemplateStr.values, false);
     if (!body) {
-        return result;
+        return -1;
     }
 
-    if (-1 != append_char(writer, prefix) &&
+    if (-1 != append_charp(writer, "t") &&
         -1 != append_repr(writer, body))
     {
         result = 0;
@@ -692,21 +680,6 @@ _write_values_subarray(PyUnicodeWriter *writer, asdl_expr_seq *values, Py_ssize_
     return result;
 }
 
-static int
-append_templatestr(PyUnicodeWriter *writer, expr_ty e)
-{
-    PyArena *arena = _PyArena_New();
-    if (!arena) {
-        return -1;
-    }
-
-    Py_ssize_t len = asdl_seq_LEN(e->v.TemplateStr.values);
-    int result = _write_values_subarray(writer, e->v.TemplateStr.values,
-            0, len - 1, 't', arena);
-    _PyArena_Free(arena);
-    return result;
-}
-
 static int
 append_joinedstr(PyUnicodeWriter *writer, expr_ty e, bool is_format_spec)
 {