Revert "CLN: DataFrame.__repr__ (#44271)" (#44286)

This reverts commit 015541e.

Author: simonjayhawkins

pandas/core/frame.py

@@ -988,13 +988,15 @@ def __repr__(self) -> str:
         """
         Return a string representation for a particular DataFrame.
         """
+        buf = StringIO("")
         if self._info_repr():
-            buf = StringIO("")
             self.info(buf=buf)
             return buf.getvalue()
 
         repr_params = fmt.get_dataframe_repr_params()
-        return self.to_string(**repr_params)
+        self.to_string(buf=buf, **repr_params)
+
+        return buf.getvalue()
 
     def _repr_html_(self) -> str | None:
         """