SCM opt_help_scm
= scm_object_property (sym, ly_symbol2scm ("program-option-documentation"));
string opt_help = ly_scm2string (opt_help_scm);
- replace_all (opt_help,
+ replace_all (&opt_help,
string ("\n"),
string ("\n")
+ String_convert::char_string (' ', HELP_INDENT));