Update objects.py

Add with_syntax method to Paste

Author: nickofolas

mystbin/objects.py

@@ -46,6 +46,9 @@ def __repr__(self) -> str:
     def url(self) -> str:
         syntax = f".{self.syntax}" if self.syntax else ""
         return PASTE_BASE.format(self.paste_id, syntax)
+    
+    def with_syntax(self, new_syntax: str) -> str:
+        return PASTE_BASE.format(self.paste_id, new_syntax)
 
 class PasteData:
     __slots__ = ("paste_id", "_paste_data", "paste_content", "paste_syntax", "paste_nick", "paste_date")
@@ -79,4 +82,4 @@ def created_at(self) -> datetime.datetime:
     @property
     def content(self) -> str:
         """ Return the paste content but dedented correctly. """
-        return dedent(self.paste_content)
+        return dedent(self.paste_content)