dselect: Improve color-spec --help output

debian/changelog

@@ -113,6 +113,7 @@ dpkg (1.18.0) UNRELEASED; urgency=low
     Closes: #693951
   * Improve commands listing in «dselect --help» output, by printing them
     before options and listing them one on each line with a description.
+  * Improve dselect color-spec --help output.
 
   [ Raphaël Hertzog ]
   * Drop myself from Uploaders.

dselect/main.cc

@@ -190,8 +190,8 @@ usage(const struct cmdinfo *ci, const char *value)
 "  --admindir <directory>     Use <directory> instead of %s.\n"
 "  --expert                   Turn on expert mode.\n"
 "  --debug <file> | -D<file>  Turn on debugging, sending output to <file>.\n"
-"  --colour | --color screenpart:[foreground],[background][:attr[+attr+...]]\n"
-"                             Configure screen colours.\n"
+"  --color <color-spec>       Configure screen colors.\n"
+"  --colour <color-spec>      Ditto.\n"
 "\n"), ADMINDIR);
 
   printf(_(
@@ -199,21 +199,22 @@ usage(const struct cmdinfo *ci, const char *value)
 "  --version                  Show the version.\n"
 "\n"));
 
+  printf(_("<color-spec> is <screen-part>:[<foreground>],[<background>][:<attr>[+<attr>]...]\n"));
 
-  printf(_("Screenparts:\n"));
+  printf(_("<screen-part> is:"));
   for (i=0; screenparttable[i].name; i++)
-    printf("  %s", screenparttable[i].name);
-  fputs("\n\n", stdout);
+    printf(" %s", screenparttable[i].name);
+  fputs("\n", stdout);
 
-  printf(_("Colours:\n"));
+  printf(_("<color> is:"));
   for (i=0; colourtable[i].name; i++)
-    printf("  %s", colourtable[i].name);
-  fputs("\n\n", stdout);
+    printf(" %s", colourtable[i].name);
+  fputs("\n", stdout);
 
-  printf(_("Attributes:\n"));
+  printf(_("<attr> is:"));
   for (i=0; attrtable[i].name; i++)
-    printf("  %s", attrtable[i].name);
-  fputs("\n\n", stdout);
+    printf(" %s", attrtable[i].name);
+  fputs("\n", stdout);
 
   m_output(stdout, _("<standard output>"));
 

man/dselect.1

@@ -75,7 +75,7 @@ Turn on debugging. Debugging information is sent to \fIfile\fP.
 Turns on expert mode, i.e. doesn't display possibly annoying help
 messages.
 .TP
-.BR \-\-colour | \-\-color " \fIscreenpart:\fP[\fIforeground\fP],[\fIbackground\fP][\fI:attr\fP[\fI+attr+...\fP]]"
+.BR \-\-colour | \-\-color " \fIscreenpart\fP:[\fIforeground\fP],[\fIbackground\fP][:\fIattr\fP[\fI+attr\fP]...]"
 Configures screen colors. This works only if your display supports colors.
 This option may be used multiple times (and is best used in
 \fIdselect.cfg\fP). Each use changes the color (and optionally, other