What
When a plugin you have installed does not satisfy a required version range, the error can now end with a hint on how to find a version in range, such as running the plugin update command. If the exact command cannot be worked out, it says to update that plugin. Before, the message stopped after listing the required range.
Why
The error tells you how to fix the problem, not only what it is.
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The writer flagged doubt
In which situations the hint is added is not known.