docs/debugging: use a version command that will work with i3 < 4.3

diff --git a/docs/debugging b/docs/debugging
index 88948c50bc9bf334fa2306fa7076b49655ea868d..9dec3056ec0643b7b8b0c0eb32a0d0bd35037ded 100644 (file)
--- a/docs/debugging
+++ b/docs/debugging
@@ -16,7 +16,7 @@ Only the latest major version of i3 is supported, i.e. version 4.7 currently.
 To verify which version you are running, use:
 
 ---------------
-$ i3 --moreversion
+$ i3 --moreversion 2>&- || i3 --version
 Binary i3 version:  4.7 (2013-12-22, branch "tags/4.7")
 Running i3 version: 4.7-84-gac74a63 (2014-01-01, branch "next") (pid 1995)
 ---------------