small fix in usage text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/include/usage.src.h b/include/usage.src.h
index 878e7a2..bd2e563 100644
--- a/include/usage.src.h
+++ b/include/usage.src.h
@@ -5097,7 +5097,7 @@
 #define who_full_usage "\n\n" \
        "Show who is logged on\n" \
      "\nOptions:" \
-     "\n	-a	show all" \
+     "\n	-a	Show all" \
 
 #define whoami_trivial_usage \
        ""