afh_recv: Improve documentation of --begin-chunk.

The help text referred to --info, which was removed four years ago
in commit 06f33ca1. This patch also inlucdes a couple of minor other
improvements to the same paragraph.

diff --git a/m4/gengetopt/afh_recv.m4 b/m4/gengetopt/afh_recv.m4
index 08c3152121797a39218bced32d4944635acc212a..28a0a9ea09ef7204256beaf254f5d0e200653966 100644 (file)
--- a/m4/gengetopt/afh_recv.m4
+++ b/m4/gengetopt/afh_recv.m4
@@ -22,19 +22,19 @@ required
 
 option "begin-chunk" b
 #~~~~~~~~~~~~~~~~~~~~~
-"skip a number of chunks"
+"skip the beginning of the file"
 int typestr = "chunk_num"
 default = "0"
 optional
 details = "
        The chunk_num argument must be between -num_chunks and
-       num_chunks - 1 inclusively where num_chunks is the total number
-       of chunks which is printed when using the --info option. If
-       chunk_num is negative, the given number of chunks are counted
-       backwards from the end of the file. For example --begin-chunk
-       -100 instructs para_afh to start output at chunk num_chunks
-       - 100. This is mainly useful for cutting off the end of an
-       audio file.
+       num_chunks - 1, inclusively, where num_chunks is the total
+       number of chunks of the audio file given by the argument to
+       --filename. If chunk_num is negative, the given number of
+       chunks are counted backwards from the end of the file. For
+       example --begin-chunk -100 instructs the afh receiver to
+       start output at chunk num_chunks - 100. This is useful for
+       selecting the last part of an audio file.
 "
 
 option "end-chunk" e