Correct copy-pasto where we're talking about function attributes and not parameter attributes.

llvm-svn: 168619

llvm/docs/LangRef.html

@@ -1197,7 +1197,7 @@ define void @f() gc "name" { ... }
 
 <p>Function attributes are set to communicate additional information about a
    function. Function attributes are considered to be part of the function, not
-   of the function type, so functions with different parameter attributes can
+   of the function type, so functions with different function attributes can
    have the same function type.</p>
 
 <p>Function attributes are simple keywords that follow the type specified. If