Use Unicode characters for file extract

trans/transpiler/__init__.py

@@ -93,8 +93,8 @@ def exception_hook(exc_type, exc_value, tb):
         offset = start + 1
         for i, line in enumerate(hg[start:last_node.end_lineno + CONTEXT_SIZE]):
             erroneous = last_node.lineno <= offset + i <= last_node.end_lineno
-            indicator = cf.white("**>") if erroneous else "   "
-            disp = f"\x1b[24m{indicator}{cf.white}{(offset + i):>4}{cf.red if erroneous else cf.reset} |{cf.reset} {line}\x1b[24m"
+            indicator = cf.white("  →") if erroneous else "   "
+            disp = f"\x1b[24m{indicator}{cf.white}{(offset + i):>4}{cf.red if erroneous else cf.reset} ▎{cf.reset} {line}\x1b[24m"
             print(disp)
             # print(repr(disp))
     print()