Fix spurious error when both gmake and makeinfo are not available

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/configure b/configure
index 7118ce3..5f7b429 100755
--- a/configure
+++ b/configure
@@ -12305,7 +12305,7 @@
 
 
 if test "_$MAKEINFO" = "_"; then
-    MAKEINFO="@echo Makeinfo is missing. Info documentation will not be built.;true"
+    MAKEINFO="echo Makeinfo is missing. Info documentation will not be built."
 else
     case "$MAKEINFO" in
       */missing.*)