The environment variable SM_NO_LINE_FOLD can be set to prevent the line wrapping in log files. Add the following lines to the BASEDIR/local/conf/runcmd_env.sh file:

export SM_NO_LINE_FOLD
SM_NO_LINE_FOLD="TRUE"

You can use any string value for SM_NO_LINE_FOLD, it is only if it has no string associated with it that lines fold.