perf list: Support newlines in wordwrap

Rather than a newline starting from column 0, record a newline was
seen and then add the newline and space before the next word.

Signed-off-by: Ian Rogers <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Caleb Biggers <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Kajol Jain <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Leo Yan <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Perry Taylor <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Ravi Bangoria <[e-mail]>
Cc: Rob Herring <[e-mail]>
Cc: Sandipan Das <[e-mail]>
Cc: Stephane Eranian <[e-mail]>
Cc: Weilin Wang <[e-mail]>
Cc: Xin Gao <[e-mail]>
Cc: Xing Zhengjun <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/builtin-list.c

···
 {
 	int column = start;
 	int n;
+	bool saw_newline = false;
 
 	while (*s) {
-		int wlen = strcspn(s, " \t");
+		int wlen = strcspn(s, " \t\n");
 
-		if (column + wlen >= max && column > start) {
+		if ((column + wlen >= max && column > start) || saw_newline) {
 			printf("\n%*s", start, "");
 			column = start + corr;
 		}
 		n = printf("%s%.*s", column > start ? " " : "", wlen, s);
 		if (n <= 0)
 			break;
+		saw_newline = s[wlen] == '\n';
 		s += wlen;
 		column += n;
 		s = skip_spaces(s);
···
 		wordwrap(desc, 8, pager_get_columns(), 0);
 		printf("]\n");
 	}
-
+	long_desc = long_desc ?: desc;
 	if (long_desc && print_state->long_desc) {
 		printf("%*s", 8, "[");
 		wordwrap(long_desc, 8, pager_get_columns(), 0);
···
 	}
 
 	if (print_state->detailed && encoding_desc) {
-		printf("%*s%s", 8, "", encoding_desc);
+		printf("%*s", 8, "");
+		wordwrap(encoding_desc, 8, pager_get_columns(), 0);
 		if (metric_name)
 			printf(" MetricName: %s", metric_name);
 		if (metric_expr)