sed: document -E in help text

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

1 files changed, 3 insertions, 3 deletions

diff --git a/editors/sed.c b/editors/sed.c
index e3cce433e..5577f3582 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -59,15 +59,15 @@
  */
 
 //usage:#define sed_trivial_usage
-//usage:       "[-inr] [-f FILE]... [-e CMD]... [FILE]...\n"
-//usage:       "or: sed [-inr] CMD [FILE]..."
+//usage:       "[-inrE] [-f FILE]... [-e CMD]... [FILE]...\n"
+//usage:       "or: sed [-inrE] CMD [FILE]..."
 //usage:#define sed_full_usage "\n\n"
 //usage:       "        -e CMD  Add CMD to sed commands to be executed"
 //usage:     "\n        -f FILE Add FILE contents to sed commands to be executed"
 //usage:     "\n        -i[SFX] Edit files in-place (otherwise sends to stdout)"
 //usage:     "\n                Optionally back files up, appending SFX"
 //usage:     "\n        -n      Suppress automatic printing of pattern space"
-//usage:     "\n        -r      Use extended regex syntax"
+//usage:     "\n        -r,-E   Use extended regex syntax"
 //usage:     "\n"
 //usage:     "\nIf no -e or -f, the first non-option argument is the sed command string."
 //usage:     "\nRemaining arguments are input files (stdin if none)."