Update Cmake option docstring

Author: 20162026

CMakeLists.txt

@@ -16,14 +16,14 @@ project(
 # [CMAKE.SKIP_EXAMPLES]
 option(
     BEMAN_INPLACE_VECTOR_BUILD_EXAMPLES
-    "Enable building examples. Default: ON. Values: { ON, OFF }."
+    "Enable building examples. Default: ${PROJECT_IS_TOP_LEVEL}. Values: { ON, OFF}."
     ${PROJECT_IS_TOP_LEVEL}
 )
 
 # [CMAKE.SKIP_TESTS]
 option(
     BEMAN_INPLACE_VECTOR_BUILD_TESTS
-    "Enable building tests and test infrastructure. Default: ON. Values: { ON, OFF }."
+    "Enable building tests and test infrastructure. Default: ${PROJECT_IS_TOP_LEVEL}. Values: { ON, OFF }."
     ${PROJECT_IS_TOP_LEVEL}
 )