doc: csplit: clarify input may not be reproducible from output

* doc/coreutils.texi (csplit invocation): Clarify that
portions of the input may be skipped and thus the input
may not be reproducible by just concatenating the output files.
Fixes https://bugs.gnu.org/32317

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index dc289968649f663e8dcff7f51e782b942e13b75c..12ddafb8847b4374428e52b4c07532372707fb35 100644 (file)
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -3427,7 +3427,8 @@ The output files' names consist of a prefix (@samp{xx} by default)
 followed by a suffix.  By default, the suffix is an ascending sequence
 of two-digit decimal numbers from @samp{00} to @samp{99}.  In any case,
 concatenating the output files in sorted order by file name produces the
-original input file.
+original input file, excluding portions skipped with a %@var{regexp}%
+pattern or the @option{--suppress-matched} option.
 
 By default, if @command{csplit} encounters an error or receives a hangup,
 interrupt, quit, or terminate signal, it removes any output files