add missing spaces for docstrings

src/ctapipe/monitoring/outlier.py

@@ -58,7 +58,7 @@ class RangeOutlierDetector(OutlierDetector):
         trait=traits.Float(),
         default_value=[1.0, 2.0],
         help=(
-            "Range of valid statistic values (in units of the image value)."
+            "Range of valid statistic values (in units of the image value). "
             "Values outside the range are identified as outliers."
         ),
         minlen=2,
@@ -86,8 +86,8 @@ class MedianOutlierDetector(OutlierDetector):
         trait=traits.Float(),
         default_value=[-1.0, 1.0],
         help=(
-            "Multiplicative factors (unitless) applied to the camera median"
-            "of the provided statistic values to define a valid range based on the"
+            "Multiplicative factors (unitless) applied to the camera median "
+            "of the provided statistic values to define a valid range based on the "
             "deviation of the values to its camera median."
         ),
         minlen=2,
@@ -118,8 +118,8 @@ class StdOutlierDetector(OutlierDetector):
         trait=traits.Float(),
         default_value=[-1.0, 1.0],
         help=(
-            "Multiplicative factors (unitless) applied to the camera standard deviation"
-            "of the provided statistic values to define a valid range based on the"
+            "Multiplicative factors (unitless) applied to the camera standard deviation "
+            "of the provided statistic values to define a valid range based on the "
             "deviation of the values to its camera median."
         ),
         minlen=2,