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-rw-r--r--doc/lispref/strings.texi5
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/lispref/strings.texi b/doc/lispref/strings.texi
index d5980f62bd4..02dfdfb0971 100644
--- a/doc/lispref/strings.texi
+++ b/doc/lispref/strings.texi
@@ -921,7 +921,10 @@ floating-point number.
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