(format "%#x" 0) yields "0", not "0x0"

* doc/lispref/strings.texi (Formatting Strings):
* src/editfns.c (Fformat): Document this.

2 files changed, 2 insertions, 2 deletions

diff --git a/doc/lispref/strings.texi b/doc/lispref/strings.texi
index f68199e9f98..2fff3c7c75c 100644
--- a/doc/lispref/strings.texi
+++ b/doc/lispref/strings.texi
@@ -1025,7 +1025,7 @@ both flags are used, @samp{+} takes precedence.
 
   The flag @samp{#} specifies an alternate form which depends on
 the format in use.  For @samp{%o}, it ensures that the result begins
-with a @samp{0}.  For @samp{%x} and @samp{%X}, it prefixes the result
+with a @samp{0}.  For @samp{%x} and @samp{%X}, it prefixes nonzero results
 with @samp{0x} or @samp{0X}.  For @samp{%e} and @samp{%f}, the
 @samp{#} flag means include a decimal point even if the precision is
 zero.  For @samp{%g}, it always includes a decimal point, and also
diff --git a/src/editfns.c b/src/editfns.c
index ccc0d27b139..09f836c3eb4 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -4202,7 +4202,7 @@ The - and 0 flags affect the width specifier, as described below.
 
 The # flag means to use an alternate display form for %o, %x, %X, %e,
 %f, and %g sequences: for %o, it ensures that the result begins with
-\"0\"; for %x and %X, it prefixes the result with \"0x\" or \"0X\";
+\"0\"; for %x and %X, it prefixes nonzero results with \"0x\" or \"0X\";
 for %e and %f, it causes a decimal point to be included even if the
 precision is zero; for %g, it causes a decimal point to be
 included even if the precision is zero, and also forces trailing