CodingStyle: Document the exception of not splitting user-visible strings, for grepping

The limit on the length of lines is 80 columns and this is a strongly

preferred limit.

Statements longer than 80 columns will be broken into sensible chunks.

Descendants are always substantially shorter than the parent and are placed

substantially to the right. The same applies to function headers with a long

argument list. Long strings are as well broken into shorter strings. The

only exception to this is where exceeding 80 columns significantly increases

readability and does not hide information.

void fun(int a, int b, int c)

{

	if (condition)

		printk(KERN_WARNING "Warning this is a long printk with "

						"3 parameters a: %u b: %u "

						"c: %u \n", a, b, c);

	else

		next_statement;

}

Statements longer than 80 columns will be broken into sensible chunks, unless

exceeding 80 columns significantly increases readability and does not hide

information. Descendants are always substantially shorter than the parent and

are placed substantially to the right. The same applies to function headers

with a long argument list. However, never break user-visible strings such as

printk messages, because that breaks the ability to grep for them.

		Chapter 3: Placing Braces and Spaces