WordPress/wp-includes/blocks/columns/editor.css

.wp-block-columns :where(.wp-block){
  margin-left:0;
  margin-right:0;
  max-width:none;
}

html :where(.wp-block-column){
  margin-bottom:0;
  margin-top:0;
}
Editor: Remove unnecessary CSS comments from compiled styles. Props aristath, adamsilverstein, SergeyBiryukov, gziolo. Fixes #56388. Built from https://develop.svn.wordpress.org/trunk@55193 git-svn-id: http://core.svn.wordpress.org/trunk@54726 1a063a9b-81f0-0310-95a4-ce76da25c4cd 2023-02-02 19:59:20 +01:00			`.wp-block-columns :where(.wp-block){`
			`margin-left:0;`
			`margin-right:0;`
			`max-width:none;`
Editor: Enqueue script and style assets only for blocks present on the page Adds styles for individual core blocks to make it possible to render only styles for those blocks that are rendered on the page (frontend). This is optinal functionality for start that can be controlled with the new `separate_core_block_assets` filter. In addition to that, styles can be inlined when `path` is passed when registering an individual styles. This functionality can be changed with the new `styles_inline_size_limit` filter. The maximum size of inlined styles in bytes defaults to 20 000. Props aristath, aduth, westonruter, mcsf. Fixes #50328, #52620. Built from https://develop.svn.wordpress.org/trunk@50836 git-svn-id: http://core.svn.wordpress.org/trunk@50445 1a063a9b-81f0-0310-95a4-ce76da25c4cd 2021-05-11 11:43:08 +02:00			`}`

Editor: Remove unnecessary CSS comments from compiled styles. Props aristath, adamsilverstein, SergeyBiryukov, gziolo. Fixes #56388. Built from https://develop.svn.wordpress.org/trunk@55193 git-svn-id: http://core.svn.wordpress.org/trunk@54726 1a063a9b-81f0-0310-95a4-ce76da25c4cd 2023-02-02 19:59:20 +01:00			`html :where(.wp-block-column){`
			`margin-bottom:0;`
			`margin-top:0;`
Editor: Enqueue script and style assets only for blocks present on the page Adds styles for individual core blocks to make it possible to render only styles for those blocks that are rendered on the page (frontend). This is optinal functionality for start that can be controlled with the new `separate_core_block_assets` filter. In addition to that, styles can be inlined when `path` is passed when registering an individual styles. This functionality can be changed with the new `styles_inline_size_limit` filter. The maximum size of inlined styles in bytes defaults to 20 000. Props aristath, aduth, westonruter, mcsf. Fixes #50328, #52620. Built from https://develop.svn.wordpress.org/trunk@50836 git-svn-id: http://core.svn.wordpress.org/trunk@50445 1a063a9b-81f0-0310-95a4-ce76da25c4cd 2021-05-11 11:43:08 +02:00			`}`