Apply suggestions from code review

Co-authored-by: Beth <167304066+bprobert97@users.noreply.github.com>

Author: rwb27

src/labthings_fastapi/base_descriptor.py

@@ -28,7 +28,7 @@ class DescriptorNotAddedToClassError(RuntimeError):
     """Descriptor has not yet been added to a class.
 
     This error is raised if certain properties of descriptors are accessed
-    before ``__set_name__`` has been called on the descriptor.  ``__set_name``
+    before ``__set_name__`` has been called on the descriptor.  ``__set_name__``
     is part of the descriptor protocol, and is called when a class is defined
     to notify the descriptor of its name and owning class.
 
@@ -122,7 +122,7 @@ def __set_name__(self, owner: type[Thing], name: str) -> None:
         if name in attr_docs:
             self.__doc__ = attr_docs[name]
 
-    def assert_set_name_called(self):
+    def assert_set_name_called(self) -> None:
         """Raise an exception if ``__set_name__`` has not yet been called.
 
         :raises DescriptorNotAddedToClassError: if ``__set_name__`` has not yet

src/labthings_fastapi/thing_property.py

@@ -15,7 +15,7 @@ class Counter(lt.Thing):
         "A counter that knows what's remaining."
 
         count: int = lt.property(default=0, readonly=True)
-        "The number of times we've increnented the counter."
+        "The number of times we've incremented the counter."
 
         target: int = lt.property(default=10)
         "The number of times to increment before we stop."
@@ -184,7 +184,8 @@ def default_factory_from_arguments(
     """
     if default is ... and default_factory is None:
         # If the default is an ellipsis, we have no default value.
-        # This is not allowed for DataProperty, so we raise an error.
+        # Not having a default_factory alongside this
+        # is not allowed for DataProperty, so we raise an error.
         raise MissingDefaultError()
     if default is not ... and default_factory is not None:
         # If both default and default_factory are set, we raise an error.