IBMBackend minor doc string fixes

qiskit_ibm_provider/ibm_backend.py

@@ -290,6 +290,7 @@ def _default_options(cls) -> Options:
     @property
     def dtm(self) -> float:
         """Return the system time resolution of output signals
+
         Returns:
             dtm: The output signal timestep in seconds.
         """
@@ -308,6 +309,7 @@ def meas_map(self) -> List[List[int]]:
         """Return the grouping of measurements which are multiplexed
         This is required to be implemented if the backend supports Pulse
         scheduling.
+
         Returns:
             meas_map: The grouping of measurements which are multiplexed
         """
@@ -316,13 +318,15 @@ def meas_map(self) -> List[List[int]]:
     @property
     def target(self) -> Target:
         """A :class:`qiskit.transpiler.Target` object for the backend.
+
         Returns:
             Target
         """
         return self._get_target()
 
     def target_history(self, datetime: Optional[python_datetime] = None) -> Target:
         """A :class:`qiskit.transpiler.Target` object for the backend.
+
         Returns:
             Target with properties found on `datetime`
         """