[#1]
this is just plain text, it contains $, | and [ but no actual
template!

= boring but necessary test
[END]

[#2]
Test that we can use the variable substitution:
variable = ${variable}
var      = ${var}
[END]

[#3]
Test that we can use the [inclusion] mechanism:
$<#2>
[END]

[#4]Test quoted inclusion as well: $"#2"[END]

[#5]
Test nested patterns:
$<#${which}>
====[END]

[#6]
Test that we can introduce/override variables during inclusion:
$<#${which}|var=bird,which=3>
[END]