Update library/debug.c

Fix trailing white-space

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/debug.c b/library/debug.c
index cc88437..eecde10 100644
--- a/library/debug.c
+++ b/library/debug.c
@@ -84,7 +84,7 @@
         str[ret]     = '\n';
         str[ret + 1] = '\0';
     }
-    else 
+    else
     {
         str[DEBUG_BUF_SIZE - 2] = '\n';
     }