- implemented arbitrary padding char for tabwriter

- implemented right-to-left alignment (numerical results)
- better comments and error handling
- added more tests
- updated dependent files

R=r
DELTA=232  (175 added, 11 deleted, 46 changed)
OCL=19761
CL=19780

2 files changed, 10 insertions, 2 deletions

diff --git a/usr/gri/pretty/printer.go b/usr/gri/pretty/printer.go
index cefabb66f..6bb755b4b 100644
--- a/usr/gri/pretty/printer.go
+++ b/usr/gri/pretty/printer.go
@@ -604,7 +604,11 @@ func (P *Printer) Declaration(d *AST.Decl, parenthesized bool) {
 
 func (P *Printer) Program(p *AST.Program) {
 	// TODO should initialize all fields?
-	P.writer = TabWriter.New(OS.Stdout, int(tabwidth.IVal()), 1, usetabs.BVal());
+	padchar := byte(' ');
+	if usetabs.BVal() {
+		padchar = '\t';
+	}
+	P.writer = TabWriter.New(OS.Stdout, int(tabwidth.IVal()), 1, padchar, true);
 	
 	P.clist = p.comments;
 	P.cindex = 0;
diff --git a/usr/gri/pretty/untab.go b/usr/gri/pretty/untab.go
index cd5981b53..af4814c1d 100644
--- a/usr/gri/pretty/untab.go
+++ b/usr/gri/pretty/untab.go
@@ -36,7 +36,11 @@ func Untab(name string, src *os.FD, dst *tabwriter.Writer) {
 
 func main() {
 	flag.Parse();
-	dst := tabwriter.New(os.Stdout, int(tabwidth.IVal()), 1, usetabs.BVal());
+	padchar := byte(' ');
+	if usetabs.BVal() {
+		padchar = '\t';
+	}
+	dst := tabwriter.New(os.Stdout, int(tabwidth.IVal()), 1, padchar, true);
 	if flag.NArg() > 0 {
 		for i := 0; i < flag.NArg(); i++ {
 			name := flag.Arg(i);