Parser: Introduce VoidElementContentError

[marcoroth]

This pull request updates the parser to introduce a new VoidElementContentError that gets added to a HTMLElementNode that was transformed from a tag or content_tag call when the tag used is a void element.

For example:

<%= content_tag :img, "/image.png" %>

Now gets parsed as the following with action_view_helpers: true:

@ DocumentNode (location: (1:0)-(1:37))
└── children: (1 item)
    └── @ HTMLElementNode (location: (1:0)-(1:37))
        ├── errors: (1 error)
        │   └── @ VoidElementContentError (location: (1:0)-(1:37))
        │       ├── message: "Void element `img` cannot have content. `img` does not accept positional arguments."
        │       └── tag_name: "img" (location: (1:4)-(1:15))
        │
        ├── open_tag:
        │   └── @ ERBOpenTagNode (location: (1:0)-(1:37))
        │       ├── tag_opening: "<%=" (location: (1:0)-(1:3))
        │       ├── content: " content_tag :img, "/image.png" " (location: (1:3)-(1:35))
        │       ├── tag_closing: "%>" (location: (1:35)-(1:37))
        │       ├── tag_name: "img" (location: (1:4)-(1:15))
        │       └── children: []
        │
        ├── tag_name: "img" (location: (1:4)-(1:15))
        ├── body: (1 item)
        │   └── @ HTMLTextNode (location: (1:0)-(1:37))
        │       └── content: "/image.png"
        │
        ├── close_tag: ∅
        ├── is_void: true
        └── element_source: "ActionView::Helpers::TagHelper#content_tag"

It also catches:

<%= tag.img "/image.png" %>

@ DocumentNode (location: (1:0)-(1:27))
└── children: (1 item)
    └── @ HTMLElementNode (location: (1:0)-(1:27))
        ├── errors: (1 error)
        │   └── @ VoidElementContentError (location: (1:0)-(1:27))
        │       ├── message: "Void element `img` cannot have content. `img` does not accept positional arguments."
        │       └── tag_name: "img" (location: (1:8)-(1:11))
        │
        ├── open_tag:
        │   └── @ ERBOpenTagNode (location: (1:0)-(1:27))
        │       ├── tag_opening: "<%=" (location: (1:0)-(1:3))
        │       ├── content: " tag.img "/image.png" " (location: (1:3)-(1:25))
        │       ├── tag_closing: "%>" (location: (1:25)-(1:27))
        │       ├── tag_name: "img" (location: (1:8)-(1:11))
        │       └── children: []
        │
        ├── tag_name: "img" (location: (1:8)-(1:11))
        ├── body: (1 item)
        │   └── @ HTMLTextNode (location: (1:0)-(1:27))
        │       └── content: "/image.png"
        │
        ├── close_tag: ∅
        ├── is_void: true
        └── element_source: "ActionView::Helpers::TagHelper#tag"

[pkg-pr-new]

npx https://pkg.pr.new/@herb-tools/formatter@1454

npx https://pkg.pr.new/@herb-tools/language-server@1454

npx https://pkg.pr.new/@herb-tools/linter@1454

commit: d1a6808

[github-actions]

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