---

This section details on the original issue you should resolve

<issue_title>Assembly is not shown in generated instruction appendix if there are no variables</issue_title>
<issue_description>Describe the bug
When there are no variables in an instruction, the assembly field of the instruction yaml uses "" as the assembly string because the assembly is automatically prefixed with the instruction name. When the assembly field is set to the empty string, it does not appear in the generated instruction appendix.

For example, sext.h produces the following:

[#udb:doc:inst:sext_h]
== sext.h

Synopsis::
Sign-extend halfword

Assembly::
sext.h xd, xs1

Encoding::
[wavedrom, ,svg,subs='attributes',width="100%"]
....
{"reg":[{"bits":7,"name": 0x13,"type":2},{"bits":5,"name": "xd","type":4},{"bits":3,"name": 0x1,"type":2},{"bits":5,"name": "xs1","type":4},{"bits":12,"name": 0x605,"type":2}]}
....

while fence.i produces

[#udb:doc:inst:fence_i]
== fence.i

Synopsis::
Instruction fence

Encoding::
[wavedrom, ,svg,subs='attributes',width="100%"]
....
{"reg":[{"bits":7,"name": 0xf,"type":2},{"bits":5,"name": "xd","type":4},{"bits":3,"name": 0x1,"type":2},{"bits":5,"name": "xs1","type":4},{"bits":12,"name": "imm","type":4}]}
....

An empty assembly string should still produce an assembly section in the output. It should just contain the name of the instruction.
</issue_description>

<agent_instructions>Look at the differente backend/ erb instruction templates and see which ones may produce this bug. then create a PR to fix them all. </agent_instructions>

Comments on the Issue (you are @copilot in this section)

@AFOliveira To fix this, we need to change the .erb template that produces that. Can you specify in which document you found that?