fputs (VERSION_OPTION_DESCRIPTION, stdout);
fputs (_("\
\n\
-If FIRST or INCREMENT is omitted, it defaults to 1.\n\
+If FIRST or INCREMENT is omitted, it defaults to 1. That is, an\n\
+omitted INCREMENT defaults to 1 even when LAST is smaller than FIRST.\n \
FIRST, INCREMENT, and LAST are interpreted as floating point values.\n\
-INCREMENT should be positive if FIRST is smaller than LAST, and negative\n\
-otherwise. When given, the FORMAT argument must contain exactly one of\n\
+INCREMENT is usually positive if FIRST is smaller than LAST, and\n\
+INCREMENT is usually negative if FIRST is greater than LAST.\n\
+When given, the FORMAT argument must contain exactly one of\n\
the printf-style, floating point output formats %e, %f, %g\n\
"), stdout);
printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);