checkpatch / remove quoted string split across lines

[pguibert6WIND]

sometimes, we need to split the quote in two. because we are in indented code, and the message we carry is big.

I think it would really bring improvements if that rule is not applied to frr code.

[qlyoung]

https://www.kernel.org/doc/html/v4.10/process/coding-style.html#breaking-long-lines-and-strings

...never break user-visible strings such as printk messages, because that breaks the ability to grep for them.

If it's really a degenerate case, consider reducing the level of indentation, or defining your string literals on a separate line.

[donaldsharp]

I agree w/ Quentin, the debug line should be on one line to allow for grepping. I find it extremely useful to do this and use it often.