doc: document -dump_separator

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

doc/codecs.texi

@@ -1118,6 +1118,15 @@ instead of alpha. Default is 0.
 @item codec_whitelist @var{list} (@emph{input})
 "," separated List of allowed decoders. By default all are allowed.
 
+@item dump_separator @var{string} (@emph{input})
+Separator used to separate the fields printed on the command line about the
+Stream parameters.
+For example to separate the fields with newlines and indention:
+@example
+ffprobe -dump_separator "
+                          "  -i ~/videos/matrixbench_mpeg2.mpg
+@end example
+
 @end table
 
 @c man end CODEC OPTIONS

doc/formats.texi

@@ -172,6 +172,14 @@ is @code{0} (meaning that no offset is applied).
 @item format_whitelist @var{list} (@emph{input})
 "," separated List of allowed demuxers. By default all are allowed.
 
+@item dump_separator @var{string} (@emph{input})
+Separator used to separate the fields printed on the command line about the
+Stream parameters.
+For example to separate the fields with newlines and indention:
+@example
+ffprobe -dump_separator "
+                          "  -i ~/videos/matrixbench_mpeg2.mpg
+@end example
 @end table
 
 @c man end FORMAT OPTIONS