Doc does not describe what's currently implemented in the wild

I was writing a .wasm parser today, and I noticed that the "Hello, World" .wasm file I got from https://webassembly.studio/ includes debug info sections. Here's a list of all sections I found in the file:

```
VM SIZE FILE SIZE
-------------- --------------
NAN% 0 .debug_info 13.6Ki 30.0%
NAN% 0 .debug_str 9.38Ki 20.8%
NAN% 0 .debug_line 7.60Ki 16.8%
NAN% 0 .debug_abbrev 4.14Ki 9.2%
NAN% 0 Code 3.86Ki 8.6%
NAN% 0 .debug_pubtypes 3.10Ki 6.9%
NAN% 0 Data 1.19Ki 2.6%
NAN% 0 .debug_pubnames 1.05Ki 2.3%
NAN% 0 .debug_ranges 353 0.8%
NAN% 0 name 310 0.7%
NAN% 0 .debug_loc 276 0.6%
NAN% 0 Import 102 0.2%
NAN% 0 Type 73 0.2%
NAN% 0 Export 57 0.1%
NAN% 0 .debug_macinfo 38 0.1%
NAN% 0 Function 23 0.0%
NAN% 0 Global 23 0.0%
NAN% 0 Element 12 0.0%
NAN% 0 [WASM Header] 8 0.0%
NAN% 0 Table 7 0.0%
NAN% 0 Memory 5 0.0%
100.0% 0 TOTAL 45.1Ki 100.0%
```

I found this repo and the doc that describes wasm debugging capabilities. But it doesn't say anything about what is currently implemented. The `.debug_*` sections above seem to be named like DWARF, but are they actually DWARF? What semantics are implemented?