by tobias.schwerdtfeger:

What steps will reproduce the problem?
http://play.golang.org/p/MmaG6179Zk

Inside an ast.Block with a leading comment and at least 2 following "Nodes" (I
don't know how to call it correctly, e.g. X int  or  CallFunc()  etc.), the, beginning
from the second Node is indented wrong. This issue only happens, when
Mode:printer.SourcePos and a Tabwitdh greater than 0 is set in printer.Config{}.

Increasing the Tabwidth will result in smaller indention and vice verse.

Fix:

Delete both:
p.output = append(p.output, tabwriter.Escape)
surrounding:
p.output = append(p.output, fmt.Sprintf("//line %s:%d\n", pos.Filename,
pos.Line)...)
at file printer.go in method:
func (p *printer) atLineBegin(pos token.Position)

This will fix the issue with the indention, but has probably unwanted side effects.

---

In case of struct { ... } as seen in the example above, the indention between the 'X'
and 'int' or 'Y' and 'int' is false too. (This is unrelated to the issue described
above). Changing the Tabwidth to 0 will result in broken output => 'Xint' instead of
'X int'.
Example:
http://play.golang.org/p/pKlx5IZT89

Which version are you using?  (run 'go version')
go version devel +84cafba689b1 Wed Jul 24 17:48:13 2013 +0900 linux/amd64