Fix typos in test component docstrings.

PiperOrigin-RevId: 379999792
Change-Id: I2594db4540cfe20820951bae479d16c167ba391a

Author: dbieber

fire/test_components.py

@@ -98,7 +98,7 @@ def double(self, count=0):
       count: Input number that you want to double.
 
     Returns:
-      A number that is the double of count.s
+      A number that is the double of count.
     """
     return 2 * count
 

fire/test_components_py3.py

@@ -67,7 +67,7 @@ def double(self, count: float) -> float:
       count: Input number that you want to double.
 
     Returns:
-      A number that is the double of count.s
+      A number that is the double of count.
     """
     return 2 * count
 
@@ -89,7 +89,7 @@ def double(self, count: float = 0) -> float:
       count: Input number that you want to double.
 
     Returns:
-      A number that is the double of count.s
+      A number that is the double of count.
     """
     return 2 * count