fix: don't parse PUT's third argument as JSON

merge_srt.py

@@ -1,6 +1,5 @@
 import sys
 import shlex
-import json
 
 class SRTMerger:
     def __init__(self, srt1_filename, srt2_filename, commands_filename, output_filename):
@@ -155,12 +154,8 @@ class SRTMerger:
             index = int(parts[2])
             if index < 1:
                 return None
-            json_str = parts[3]
-            data = json.loads(json_str)
-            if 'text' not in data:
-                return None
-            text = data['text']
-        except (ValueError, json.JSONDecodeError, TypeError) as e:
+            text = parts[3]
+        except (ValueError, TypeError) as e:
             return None
         return ('PUT', source, index, text)