Width triggers the wrap after the overflow

[dga-nagra]

Description

We can give a width so that a line will be wrapped automatically:

ruamel= yaml.YAML()
ruamel.width = 80

The issue is that this will trigger the line-wrap after it overflows. For example, suppose we define the width to 80 and have the following to dump:

mylist: [ onequitelongitem, secondquitelongitem, thirdmuchlongeritem, thelongestelementofthelistthatoverflows ]

Proposal

The library will dump it this way because just after thirdmuchlongeritem we only have about 70 characters, therefore we add the last element on the same line. The library should give an option to wrap the line before the overflow happens.

The previous example would result into this instead:

mylist: [ onequitelongitem, secondquitelongitem, thirdmuchlongeritem,
              thelongestelementofthelistthatoverflows ]