In batch, don't use prompt-toolkit

* `--execute` is used
* When given a file argument and not `--persist`

Remove deprecation warning in bindkeys.py

Author: rocky

mathicsscript/__main__.py

@@ -252,7 +252,7 @@ def main(
         "Settings`$PygmentsShowTokens", from_python(True if pygments_tokens else False)
     )
 
-    readline = readline.lower()
+    readline = "none" if (execute or file and not persist) else readline.lower()
     if readline == "prompt":
         shell = TerminalShellPromptToolKit(
             definitions, style, completion, unicode, prompt

mathicsscript/bindkeys.py

@@ -66,7 +66,7 @@ def _(event):
         line = line.strip()
         if not line or line.startswith("#"):
             continue
-        fields = re.split("\s*: ", line)
+        fields = re.split(r"\s*: ", line)
         if len(fields) != 2:
             print(f"{line_no+1}: expecting 2 fields, got {len(fields)} in:\n{line}")
             continue