Fix: Add 't' prefix to stringprefix regex to support Python 3.14 template strings

Author: Anuradha-Agrawal-07

Lib/idlelib/colorizer.py

@@ -47,7 +47,8 @@ def make_pat():
                    name not in keyword.kwlist]
     builtin = r"([^.'\"\\#]\b|^)" + any("BUILTIN", builtinlist) + r"\b"
     comment = any("COMMENT", [r"#[^\n]*"])
-    stringprefix = r"(?i:r|u|f|fr|rf|b|br|rb)?"
+    # Added 't' prefix and other combinations to support Python 3.14 template strings (PEP 701)
+    stringprefix = r"(?i:r|u|f|t|fr|rf|b|br|rb|rt|tr)?"
     sqstring = stringprefix + r"'[^'\\\n]*(\\.[^'\\\n]*)*'?"
     dqstring = stringprefix + r'"[^"\\\n]*(\\.[^"\\\n]*)*"?'
     sq3string = stringprefix + r"'''[^'\\]*((\\.|'(?!''))[^'\\]*)*(''')?"