Tiny slice gets pushed onto new lines

[TomFryers]

Describe the style change For a tiny two-character slice, putting it on an extra line is often unnecessary.

Examples in the current Black style

def f():
     columnaligns = remove_columns([newheadsalign + ["text-align:center"]], removes)[0][
         1:
    ]

Desired style

def f():
     columnaligns = remove_columns([newheadsalign + ["text-align:center"]], removes)[0][1:]

[intgr]

If it exceeds the line length limit, I think Black should split it. However, it would be far better to split the longest expression, for example:

def f():
    columnaligns = remove_columns(
        [newheadsalign + ["text-align:center"]], removes
    )[0][1:]