Nested interpolation lost when mixed inside string context

[aniongithub]

Summary
When using Himl’s (himl==0.15.2 from pip) nested interpolation ({{foo.bar}}) inside a longer string, the interpolation silences the surrounding text and resolves only to the raw value. But when using the same interpolation alone, it works correctly.

---

Steps to reproduce

1. Create foo.yaml:

   foo:
     bar: 42

2. Create baz.yaml:

   resources:
     test:
       type: example:Test
       properties:
         path: "hello {{foo.bar}} world"

3. Run:

   himl-config-merger foo.yaml baz.yaml > merged.yaml

4. Expected in merged.yaml:

   resources:
     test:
       properties:
         path: "hello 42 world"

5. Actual result:

   resources:
     test:
       properties:
         path: 42

   — The string collapses to just 42.

6. Alternative case that does work:

   path: "{{foo.bar}}"

   → Correctly interpolates to:

   path: 42

Any help would be much appreciated!

[aniongithub]

It appears the bug is here

If the value to interpolate is anything other than a string, it simply returns the value itself instead of doing line.replace

[amuraru]

Thanks for reporting this issue!
Would you also file a PR please?

[aniongithub]

Can do, I have a fork with this already, will clean and submit. Thanks!