in src/com/intellij/vssSupport/CheckinOptions.java [62:89]
public List<String> getOptions(VirtualFile virtualFile){
ArrayList<String> options= new ArrayList<>();
options.add(CHECKIN_COMMAND);
String vssPath = VssUtil.getVssPath(virtualFile, myConfig.getProject());
if (vssPath != null)
options.add(vssPath);
// Comments
if(COMMENT.length()!=0){
options.add(StringUtil.escapeQuotes(_C_OPTION +COMMENT+""));
}else{
options.add(_C__OPTION);
}
// Keep checked out
if(KEEP_CHECKED_OUT){
options.add(_K_OPTION);
}else{
options.add(_K__OPTION);
}
// Default answer.
if(defaultAnswer!=null){
options.add(defaultAnswer.booleanValue()?_I_Y_OPTION :_I_N_OPTION);
}
// User name/password (if specified)
if(myConfig.USER_NAME.length()>0){
options.add(myConfig.getYOption());
}
return options;
}