support changing a tbf name (partially)

name has to be the same number of characters

tockloader/helpers.py

@@ -176,6 +176,16 @@ def plural(value):
         return "s"
 
 
+def number_or(value):
+    """
+    Try to format value as a number. If that fails, just leave it alone.
+    """
+    try:
+        return int(value, 0)
+    except:
+        return value
+
+
 def text_in_box(string, box_width, box_height=3):
     """
     Return a string like:

tockloader/main.py

@@ -1231,7 +1231,7 @@ def main():
     )
     tbf_tlv_modify.add_argument("field", help="TLV field name")
     tbf_tlv_modify.add_argument(
-        "value", help="TLV field new value", type=lambda x: int(x, 0)
+        "value", help="TLV field new value", type=helpers.number_or
     )
     tbf_tlv_modify.add_argument("tab", help="The TAB or TABs to modify", nargs="*")