Fix empty lines causing transpilation errors in nested elements

[Copilot]

Empty lines within nested elements (children blocks) were causing transpilation to fail with parsing errors. The issue occurred when empty lines appeared between elements at the same indentation level within a parent element.

Problem

div
    h1
        "Hello"

    p  # <- This line would cause "expected EOI" error
        "World"

The grammar's PUSH/DROP indentation mechanism couldn't handle empty lines within children blocks, causing the parser to exit prematurely and expect end-of-input.

Solution

Added minimal changes to the grammar rules in grammar.pest:

• Added empty_line rule using negative lookahead to properly match empty lines
• Modified later_line rule to accept either properly indented content OR empty lines

Changes

• Updated wasm-bindgen dependency from 0.2 to 0.2.88 for build compatibility
• Fixed grammar to handle empty lines within nested elements (2 lines added to grammar.pest)

Testing

Verified the fix works with:

• Empty lines within children blocks
• Multiple consecutive empty lines
• Mixed indentation patterns
• All existing functionality (original examples still work)

Fixes #2.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• rustwasm.github.io
  • Triggering command: curl REDACTED -sSf (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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[JonasLoos]

Dont change cargo.toml

Make sure whitespace on an empty line is ignored and that newline handling is accurate.

[Copilot]

Dont change cargo.toml

Make sure whitespace on an empty line is ignored and that newline handling is accurate.

I reverted the Cargo.toml changes as requested, but the build fails with "older versions of the wasm-bindgen crate are incompatible with current versions of Rust; please update to wasm-bindgen v0.2.88". The grammar changes have been updated to properly handle whitespace on empty lines using empty_line = _{ (" " | "\t")* } instead of the complex double negation approach.