boundary

```jinja
template_string Sep(n: int) #"
  {%- set s = n ~ '' -%}
  {%- if s[0] == '-' -%}
    {%- set sign = '-' -%}
    {%- set s = s[1:] -%}
  {%- else -%}
    {%- set sign = '' -%}
  {%- endif -%}
  {%- set l = s|length -%}
  {{- sign -}}
  {%- for ch in s -%}
    {%- if loop.index0 != 0 and ((l - loop.index0) % 3) == 0 -%},{%- endif -%}
    {{- ch -}}
  {%- endfor -%}
"#
```

Please make `|sep` a filter so I can delete this from my codebase 🙏

oh man 😂

i think we might support something like `{{ n|format(“:,”) }}`? 

am on my phone right now so can’t test on promptfiddle

if not, we may just need to bump or twiddle our jinja implementation to make this work, since a PR for this landed in upstream in nov: https://github.com/mitsuhiko/minijinja/issues/427

you’re welcome to take a stab at it, but otherwise we can take a look at this in the next few weeks!

FYI: when 0.220.0 goes out, you'll be able to do `{{ "{:,}".format(1234) }}` to get `1,234`

https://github.com/BoundaryML/baml/pull/3149

```jinja
template_string Sep(n: int) #"
  {{- "{:,}".format(n) -}}
"#

```
The linter throws warnings:
'{:,}' is a literal["{:,}"], expected class
'{:,}.format' is undefined, expected function

<@711679663746842796> pls make my baml_src not be yellow anymore 🥹

your wish is my command

https://github.com/BoundaryML/baml/pull/3263
https://cdn.discordapp.com/attachments/1472156456924217344/1484636363138535595/image.png?ex=69bef2dc&is=69bda15c&hm=91760df5ffaaf5e4639f61e37c9d0c7d11c625f3a222ee31e07324c81bc5edaa&