learn how to write sh correctly

diff --git a/autogen.sh b/autogen.sh
index 71dfa417ed124b4c94941a7174566396d414c392..50a3ac48e3fe0c97a29bc2823b57263570f86e00 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,12 +1,12 @@
 #!/bin/sh
 
-if ! -f NEWS ; then
+if [ ! -f NEWS ] ; then
        touch NEWS
 fi
-if ! -f AUTHORS ; then
+if [ ! -f AUTHORS ] ; then
        touch AUTHORS
 fi
-if ! -f ChangeLog ; then
+if [ ! -f ChangeLog ] ; then
        touch ChangeLog
 fi