fix repeated whitespace

Author: haampie

pandas/_libs/tslibs/offsets.pyx

@@ -4883,7 +4883,7 @@ def _warn_about_deprecated_aliases(name: str, is_period: bool) -> str:
         warnings.warn(
             f"\'{name}\' is deprecated and will be removed "
             f"in a future version, please use "
-            f"\'{c_PERIOD_AND_OFFSET_DEPR_FREQSTR.get(name)}\' "
+            f"\'{c_PERIOD_AND_OFFSET_DEPR_FREQSTR.get(name)}\'"
             f" instead.",
             FutureWarning,
             stacklevel=find_stack_level(),