fix generating config.nice; again

The fix in a8bc184 broke if an arg
containing spaces was passed to configure.

Author: m6w6

acinclude.m4

@@ -2685,20 +2685,21 @@ EOF
   else 
     CONFIGURE_COMMAND="$CONFIGURE_COMMAND [$]0"
   fi
-  for arg in $ac_configure_args; do
-    if test `expr -- $arg : "'.*"` = 0; then
-      if test `expr -- $arg : "-.*"` = 0 && test `expr -- $arg : ".*=.*"` = 0; then
-        continue;
-      fi
-      echo "'[$]arg' \\" >> $1
-      CONFIGURE_OPTIONS="$CONFIGURE_OPTIONS '[$]arg'"
-    else
-      if test `expr -- $arg : "'-.*"` = 0 && test `expr -- $arg : "'.*=.*"` = 0; then
-        continue;
-      fi
-      echo "[$]arg \\" >> $1
-      CONFIGURE_OPTIONS="$CONFIGURE_OPTIONS [$]arg"
-    fi
+  CONFIGURE_ARGS="$ac_configure_args"
+  while test "X$CONFIGURE_ARGS" != "X";
+  do
+   if CURRENT_ARG=`expr "X$CONFIGURE_ARGS" : "X *\('[[^']]*'\)"`
+   then
+     CONFIGURE_ARGS=`expr "X$CONFIGURE_ARGS" : "X *'[[^']]*' \(.*\)"`
+   elif CURRENT_ARG=`expr "X$CONFIGURE_ARGS" : "X *\([[^ ]]*\)"`
+   then
+     CONFIGURE_ARGS=`expr "X$CONFIGURE_ARGS" : "X *[[^ ]]* \(.*\)"`
+     CURRENT_ARG="'$CURRENT_ARG'"
+   else
+    break
+   fi
+   $as_echo "$CURRENT_ARG \\" >>$1
+   CONFIGURE_OPTIONS="$CONFIGURE_OPTIONS $CURRENT_ARG"
   done
   echo '"[$]@"' >> $1
   chmod +x $1