man.txt

.Dd $Mdocdate$
.Dt sum-type 1
.Os
.Sh NAME
.Nm sum-type
.Nd Sum type example
.Sh VERSION
0.0.0
.Sh SYNOPSIS
sum-type [-a | -b]
.Sh SETTINGS
  Show this help text
  switch: -h|--help

  Output version information: 0.0.0
  switch: --version

  a
  switch: -a

  b
  switch: -b

  example
  env: sum-type SUM_TYPE
  config:
    sum-type: # or null
      <string>
  default: a

.Sh OPTIONS
  -h|--help Show this help text              
  --version Output version information: 0.0.0
  -a        a                                
  -b        b                                

.Sh ENVIRONMENT VARIABLES
  sum-type SUM_TYPE   example

.Sh CONFIGURATION VALUES
  example
  sum-type:
    # or null
    <string>