fix md formatting

Author: RexJaeschke

standard/attributes.md

@@ -1486,7 +1486,7 @@ This attribute indicates that the constructor it decorates sets all required mem
 
 #### §RequiredMember The RequiredMember attribute
 
-This attribute indicates that the current type has one or more required members ([§15.7.1](classes.md#1571-general)), or that a specific member of that type is required. However, it is an error for this attribute to be used explicitly. Instead, the presence of the modifier `required` results in the type or member being treated as if it were decorated with this attribute. 
+This attribute indicates that the current type has one or more required members ([§15.7.1](classes.md#1571-general)), or that a specific member of that type is required. However, it is an error for this attribute to be used explicitly. Instead, the presence of the modifier `required` results in the type or member being treated as if it were decorated with this attribute.
 
 ## 23.6 Attributes for interoperation