Problem: The column width 10 for parser name (lang) is too short.
For example, `markdown_inline` has 15 characters, which results in a
slight misalignment with other lines.
e.g. it looked like:
```
- OK Parser: markdown ABI: 14, path: .../parser/markdown.so
- OK Parser: markdown_inline ABI: 14, path: .../parser/markdown_inline.so
- OK Parser: php ABI: 14, path: .../parser/php.so
```
Solution: Use column width 20. As of now, the longest name among those
available in nvim-treesitter has length 18 (`haskell_persistent`).
e.g.:
```
- OK Parser: markdown ABI: 14, path: .../parser/markdown.so
- OK Parser: markdown_inline ABI: 14, path: .../parser/markdown_inline.so
- OK Parser: php ABI: 14, path: .../parser/php.so
```
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