by santucco:

Before filing a bug, please check whether it has been fixed since the
latest release. Search the issue tracker and check that you're running the
latest version of Go:

Run "go version" and compare against
http://golang.org/doc/devel/release.html  If a newer version of Go exists,
install it and retry what you did to reproduce the problem.

Thanks.

What steps will reproduce the problem?
If possible, include a link to a program on play.golang.org.
1. Get an attached file test.go
2. go doc test

What is the expected output?
There are variants:
1.
<--------------------------------------------------------->
PACKAGE DOCUMENTATION

package test
    import "test"



CONSTANTS

const (
    Const1 = 1
       Const1
   
    Const2 = 2
       Const2
)

const Const3 = 3
    Const3


VARIABLES

var (
    Var1 int
       Var1

    Var2 string
       Var2
)

var Var3 bool
    Var3
<--------------------------------------------------------->
2.
<--------------------------------------------------------->
PACKAGE DOCUMENTATION

package test
    import "test"



CONSTANTS

const Const1 = 1
    Const1
    
const Const2 = 2
    Const2

const Const3 = 3
    Const3


VARIABLES

var Var1 int
    Var1
    
var Var2 string
    Var2

var Var3 bool
    Var3
<--------------------------------------------------------->

What do you see instead?
<--------------------------------------------------------->
PACKAGE DOCUMENTATION

package test
    import "test"



CONSTANTS

const (

    // Const1
    Const1 = 1
    // Const2
    Const2 = 2
)

const Const3 = 3
    Const3


VARIABLES

var (

    // Var1
    Var1 int
    // Var2
    Var2 string
)

var Var3 bool
    Var3
<--------------------------------------------------------->

Which compiler are you using (5g, 6g, 8g, gccgo)?
6g

Which operating system are you using?
Linux x86_64

Which version are you using?  (run 'go version')
go version devel +1a196137ed09 Tue Apr 09 18:17:55 2013 +1000 linux/amd64

Please provide any additional information below.
Leading newlines in groups are unnecessary too.

Attachments:

1. test.go (183 bytes)