* doc/lispref/strings.texi (Formatting Strings): One more
clarification to the last change. (Bug#25557)
Replace the specification with notation for a floating-point number,
using either exponential notation or decimal-point notation. The
exponential notation is used if the exponent would be less than -4 or
-greater than or equal to the precision (default: 6).
+greater than or equal to the precision (default: 6). By default,
+trailing zeros are removed from the fractional portion of the result
+and a decimal-point character appears only if it is followed by a
+digit.
@item %%
Replace the specification with a single @samp{%}. This format