trim extra newlines in help texts

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/procps/powertop.c b/procps/powertop.c
index e3c29d1..ddda5bd 100644
--- a/procps/powertop.c
+++ b/procps/powertop.c
@@ -674,7 +674,7 @@
 //usage:#define powertop_trivial_usage
 //usage:       ""
 //usage:#define powertop_full_usage "\n\n"
-//usage:       "Analyze power consumption on Intel-based laptops\n"
+//usage:       "Analyze power consumption on Intel-based laptops"
 
 int powertop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv)