configure: polish the grep -E message a bit further

Suggested-by: Emanuele Torre
Closes #9473

diff --git a/configure.ac b/configure.ac
index 5cda91652671d240cdb03f1333cf6a6699a29ea7..25ff78cac851d8087c5cacb933eda7fabc525f0f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -100,7 +100,7 @@ if test -z "$EGREP"; then
   fi
 fi
 if test -z "$EGREP" || test "$EGREP" = "not_found"; then
-  AC_MSG_ERROR([grep -E is not working and is egrep not found in PATH. Cannot continue.])
+  AC_MSG_ERROR([grep -E is not working and egrep is not found in PATH. Cannot continue.])
 fi
 AC_SUBST([EGREP])