Add "bash3boilerplate" from "https://git.knownelement.com/ExternalVendorCode/bash3boilerplate.git@main"

git-vendor-name: bash3boilerplate
git-vendor-dir: vendor/git.knownelement.com/ExternalVendorCode/bash3boilerplate
git-vendor-repository: https://git.knownelement.com/ExternalVendorCode/bash3boilerplate.git
git-vendor-ref: main

vendor/git.knownelement.com/ExternalVendorCode/bash3boilerplate/test/scenario/main-usage-validation/run.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+# shellcheck source=main.sh
+
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+read -r -d '' __usage <<-'EOF' || true # exits non-zero when EOF encountered
+  -0 --zero        Do nothing.
+  -1 --one         Do one thing. Required.
+                   More description.
+  -2 --two         Do two things.
+                   More. Required. Description.
+  -3 --three [arg] Do three things.
+                   Required.
+  -4 --four  {arg} Do four things.
+  -5 --five  {arg} Do five things. Required. Maybe.
+  -6 --six   [arg] Do six things. Not Required.
+                   Required, it is not.
+  -7 --seven [arg] Required. Or bust.
+  -8 --eight [arg] Do eight things.
+                   More.Required.Description.
+  -a         [arg] Do A.   Required.
+                   Default="do-a"
+  -b         {arg} Do B.Default="do-b"
+  -c         [arg] Required.   Default="do-c"
+  -d         {arg} Default="do-d"
+EOF
+
+export __usage
+export NO_COLOR="true"
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+echo "# complain about -3"
+(source "${__root}/main.sh") || true
+
+echo "# complain about -4"
+(source "${__root}/main.sh" -3 arg3) || true
+
+echo "# complain about -5"
+(source "${__root}/main.sh" -3 arg3 -4 arg4) || true
+
+echo "# complain about -8 (because -7 syntax is not supported)"
+(source "${__root}/main.sh" -3 arg3 -4 arg4 -5 arg5) || true
+
+echo "# complain about -d (because -d syntax is not supported)"
+(source "${__root}/main.sh" -3 arg3 -4 arg4 -5 arg5 -8 arg8) || true
+
+echo "# complain about nothing"
+(
+  source "${__root}/main.sh" -3 arg3 -4 arg4 -5 arg5 -8 arg8 -d argd
+  for argument in ${!arg_*}; do info "${argument}: ${!argument}"; done
+)
+
+echo "# test for issue #108"
+(
+  source "${__root}/main.sh" -3 arg3 -5 arg5 -8 arg8 -d argd --four value --zero
+  for argument in ${!arg_*}; do info "${argument}: ${!argument}"; done
+)