Fix ECL_LINEFEED_MODE test with -Werror=format-security
In Debian, the -Werror=format-security flag is now passed by default to gcc. This makes the ECL_LINEFEED_MODE test fail.
The fix is to replace the call to fprintf() by fputs().
In Debian, the -Werror=format-security flag is now passed by default to gcc. This makes the ECL_LINEFEED_MODE test fail.
The fix is to replace the call to fprintf() by fputs().