Improve line length enforcement for breakables #397
Merged
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Part of #379
This doesn't totally resolve our line-length woes, but it does get us closer to what I think users expect, which is that the render queue now takes into account both the current line length so far and the breakable's length when deciding whether or not to render it as a single- or multi-line.
Note that this only solves it for true breakables, but not for method calls and binary operators, which are currently hand-implemented due to having some more intricate special casings. Those will have to be resolved in later PRs and will generally be more involved.