Auto adapt MAX_COLUMN to terminal

[hivert]

When printing list of matrices, sage use MAX_COLUMN to split the list.

sage: m = matrix([[1,2,3,4]]*3)
sage: [m]*10
[
[1 2 3 4]  [1 2 3 4]  [1 2 3 4]  [1 2 3 4]  [1 2 3 4]  [1 2 3 4]
[1 2 3 4]  [1 2 3 4]  [1 2 3 4]  [1 2 3 4]  [1 2 3 4]  [1 2 3 4]
[1 2 3 4], [1 2 3 4], [1 2 3 4], [1 2 3 4], [1 2 3 4], [1 2 3 4],

[1 2 3 4]  [1 2 3 4]  [1 2 3 4]  [1 2 3 4]
[1 2 3 4]  [1 2 3 4]  [1 2 3 4]  [1 2 3 4]
[1 2 3 4], [1 2 3 4], [1 2 3 4], [1 2 3 4]
]

By default MAX_COLUMN = 70. We should ask the terminal if possible.

CC: @nthiery @hivert

Component: interfaces

Keywords: MAX_COLUMN, line splitting

Issue created by migration from https://trac.sagemath.org/ticket/11859

[hivert]

comment:1

The following link may help
http://stackoverflow.com/questions/566746/how-to-get-console-window-width-in-python