Drop \n from pr_perror

Another pr_perror spring cleaning time!

As pr_perror adds a semicolon, an strerror(errno), and a newline,
there's no need to add one manually.

Brought to you by

	for f in $(git grep -l pr_perror); do
		test -f $f || continue
		echo $f
		sed -i '\%^[[:space:]]*pr_perror(.*\\n"%s/\\n//' $f
	done

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

test/zdtm/static/socket-ext.c

@@ -108,7 +108,7 @@ int main(int argc, char *argv[])
 	test_waitsig();
 
 	if (unlink(path)) {
-		pr_perror("Unable to remove %s\n", path);
+		pr_perror("Unable to remove %s", path);
 		return 1;
 	}
 	if (rmdir(dir)) {