Unexpected whitespace in rendered layouts when overriding Volt blocks

Determine why overriding a Volt block adds unexpected whitespace to the rendered layout, especially when the block contains only whitespace, inline HTML, or conditional content that evaluates to empty.

The Volt compiler captures block contents through output buffering without automatically trimming leading or trailing spaces, and an unresolved design decision exists about whether this content should be trimmed before storage, which can cause version‑dependent layout differences between Phalcon 3.x and 4.x.

Is the compiler intended to preserve all whitespace inside block buffers, should developers rely on explicit trimming filters to control output, and does the handling differ between Phalcon 3.x and 4.x for empty or conditional blocks?