doc: description is truncated?

**Describe the bug**

https://mesonbuild.com/Reference-manual_functions.html#signature14

> depend_files : list[str | file] # files (str,

The comment is truncated? It must come from

https://github.com/mesonbuild/meson/blob/6447eb00d87f439147249dd593635ae14e56d0dd/docs/yaml/functions/custom_target.yaml#L134-L140

IIUC only the first line of the description is shown; then would you adjust the block so that the comment is more explanative?

And, the closing parenthesis is missed, perhaps

```diff
--- a/docs/yaml/functions/custom_target.yaml
+++ b/docs/yaml/functions/custom_target.yaml
@@ -137,3 +137,3 @@ kwargs:
files ([[@str]],
- [[@file]], or the return value of [[configure_file]] that
+ [[@file]]), or the return value of [[configure_file]] that
this target depends on but are not listed in the `command` keyword
```

**To Reproduce**

Open the link.

**Expected behavior**

Something like

> depend_files : list[str | file] # files (str, file), or the return value of configure_file()

Inspect docs/yaml/functions/custom_target.yaml around lines 134-140 and compare its generated output at the linked Reference Manual entry. Confirm whether only the first description line is rendered, then check the proposed closing parenthesis change. Done means the rendered depend_files description is complete and correctly punctuated.

Written by the indexing model from the issue text.