progress: make determinate bar more like wget progress bar

foo [                                                          ]  0/58
foo [>                                                         ]  1/58
foo [=>                                                        ]  2/58
...
foo [=======================================================>  ] 56/58
foo [========================================================> ] 57/58
foo [=========================================================>] 58/58

The bar now has a '>' character at the end. This indicates the direction,
is consistent with the indeterminate '<=>' bar, and looks much nicer.

hgext/progress.py

@@ -114,7 +114,10 b' class progbar(object):'
             progwidth = termwidth - used - 3
             if total:
                 amt = pos * progwidth // total
-                bar = '=' * (amt) + ' ' * (progwidth - amt)
+                bar = '=' * (amt - 1)
+                if amt > 0:
+                    bar += '>'
+                bar += ' ' * (progwidth - amt)
             else:
                 progwidth -= 3
                 self.indetcount += 1