sed: document where we are more liberal then GNU

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/editors/sed.c b/editors/sed.c
index f8ca5d351..f90bc5449 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -649,6 +649,12 @@ static void add_cmd(const char *cmdstr)
                 sed_cmd->cmd = *cmdstr++;
                 cmdstr = parse_cmd_args(sed_cmd, cmdstr);
 
+                /* cmdstr now points past args.
+                 * GNU sed requires a separator, if there are more commands,
+                 * else it complains "char N: extra characters after command".
+                 * Example: "sed 'p;d'". We also allow "sed 'pd'".
+                 */
+
                 /* Add the command to the command array */
                 *G.sed_cmd_tail = sed_cmd;
                 G.sed_cmd_tail = &sed_cmd->next;