assign $space= call chr $val=32
assign $heading = call str_replace $subject={_$func|default}; $search=_ ; $replace=$space
print $heading
call source $file=function_description/{_$func|default};$html_safe=1;$nl2br=1;$space2nbsp=0
[...] = optional ... = your value
call source $file=function_syntax/{_$func|default};$html_safe=1;$nl2br=1;$space2nbsp=0
call source $file=function_examples/{_$func|}.xt;$html_safe=1;$nl2br=1;$space2nbsp=0
include /function_examples/{_$func|}.xt
Also see
call source $file=function_also_see/{_$func|};$html_safe=0;$nl2br=1;$space2nbsp=0