Clarify documentation of precision in format specs

* doc/lispref/strings.texi (Formatting Strings): Be less
definitive wrt what precision means in format specs other than
floating-point, %s and %S.  (Bug#24314)

diff --git a/doc/lispref/strings.texi b/doc/lispref/strings.texi
index febe3212ba964df332f6ce10dc415de363640b74..5fee37361fd0ae49e30fa4495dfd3b9d10381744 100644 (file)
--- a/doc/lispref/strings.texi
+++ b/doc/lispref/strings.texi
@@ -1052,8 +1052,9 @@ precision specifies how many decimal places to show; if zero, the
 decimal-point itself is also omitted.  For @samp{%s} and @samp{%S},
 the precision truncates the string to the given width, so @samp{%.3s}
 shows only the first three characters of the representation for
-@var{object}.  Precision has no effect for other specification
-characters.
+@var{object}.  For other specification characters, the effect of
+precision is what the local library functions of the @code{printf}
+family produce.
 
 @node Case Conversion
 @section Case Conversion in Lisp