disallow interface {x, y()}

R=gri
DELTA=8  (3 added, 0 deleted, 5 changed)
OCL=35045
CL=35047

doc/go_spec.html

@@ -923,15 +923,16 @@ that is any superset of the interface. Such a type is said to
 <pre class="ebnf">
 InterfaceType      = "interface" "{" [ MethodSpecList ] "}" .
 MethodSpecList     = MethodSpec { ";" MethodSpec } [ ";" ] .
-MethodSpec         = IdentifierList Signature | InterfaceTypeName .
+MethodSpec         = identifier Signature | InterfaceTypeName .
 InterfaceTypeName  = TypeName .
 </pre>
 
 <pre>
 // A simple File interface
 interface {
-	Read, Write	(b Buffer) bool;
-	Close		();
+	Read(b Buffer) bool;
+	Write(b Buffer) bool;
+	Close();
 }
 </pre>
 
@@ -972,7 +973,8 @@ to define an interface called <code>Lock</code>:
 
 <pre>
 type Lock interface {
-	Lock, Unlock	();
+	Lock();
+	Unlock();
 }
 </pre>
 
@@ -999,7 +1001,8 @@ in the interface.
 
 <pre>
 type ReadWrite interface {
-	Read, Write	(b Buffer) bool;
+	Read(b Buffer) bool;
+	Write(b Buffer) bool;
 }
 
 type File interface {