ls --help: further tweak

[Jim Meyering]

I wanted a "the" before "dircolors...", so wrote this:

diff --git a/src/ls.c b/src/ls.c
index 6d81dab..cb0bec7 100644
--- a/src/ls.c
+++ b/src/ls.c
@@ -4671,7 +4671,7 @@ Mandatory arguments to long options are mandatory for 
short options too.\n\
 Using color to distinguish types of files is not enabled by default, or when\n\
 --color=never is specified.  With --color=auto, color codes are output only\n\
 when standard output is connected to a terminal.  The LS_COLORS environment\n\
-variable can change the default codes and can be set using dircolors 
command.\n\
+variable can change the coloring rules.  Use the dircolors command to set 
it.\n\
 "), stdout);
       fputs (_("\
 \n\