correct the docs of Nothing (#29210)

githubtomtom · nalimilan · commit 5dda9942208b · 2018-09-16T10:41:07.000+02:00
diff --git a/base/docs/basedocs.jl b/base/docs/basedocs.jl
@@ -794,7 +794,7 @@ devnull
 """
     Nothing
 
-A type with no fields that is the type [`nothing`](@ref).
+A type with no fields that is the type of [`nothing`](@ref).
 """
 Nothing
 
