update -V documentation

to answer #3727 comment

diff --git a/programs/zstd.1.md b/programs/zstd.1.md
index 078455f3e4e56d8d92cc93037726365d7d59e2ea..c5d0ef70a36a4ce5f41ac2f804f8e5f60e9c25e7 100644 (file)
--- a/programs/zstd.1.md
+++ b/programs/zstd.1.md
@@ -290,10 +290,11 @@ the last one takes effect.
 * `-h`/`-H`, `--help`:
     display help/long help and exit
 * `-V`, `--version`:
-    display version number and exit.
+    display version number and immediately exit.
+    note that, since it exits, flags specified after `-V` are effectively ignored.
     Advanced: `-vV` also displays supported formats.
     `-vvV` also displays POSIX support.
-    `-q` will only display the version number, suitable for machine reading.
+    `-qV` will only display the version number, suitable for machine reading.
 * `-v`, `--verbose`:
     verbose mode, display more information
 * `-q`, `--quiet`: