ElyMark: short table rows compare padded, as GFM reads them (R2.13)

apps/ely-mark/web/src/tables.js

@@ -22,7 +22,12 @@ export function canon(text) {
   let out = text
   // Later tables first, so earlier offsets hold.
   for (const table of tables.reverse()) {
-    const rows = table.children.map((row) => row.children.map((node) => cell(text, node)).join('|'))
+    const width = table.children[0].children.length
+    // GFM fills a short row with empty cells.
+    const rows = table.children.map((row) => {
+      const cells = row.children.map((node) => cell(text, node))
+      return [...cells, ...Array(Math.max(0, width - cells.length)).fill('')].join('|')
+    })
     const shape = [table.align.join(','), ...rows].join('\n')
     out = `${out.slice(0, table.position.start.offset)}\u0000${shape}\u0000${out.slice(table.position.end.offset)}`
   }

tests/scripts/mark-session.sh

@@ -131,6 +131,7 @@ check quoted.md $'> |alpha|beta|\n> |---|---|\n> |1|2|\n' 'keystroke "x"' $'> |x
 check listed.md $'- item\n\n  |alpha|beta|\n  |---|---|\n  |1|2|\n' 'keystroke "x"' $'- xitem\n\n  |alpha|beta|\n  |-|-|\n  |1|2|\n'
 # Items open with a paragraph; a leading table stays raw.
 check leading.md $'- |alpha|beta|\n  |---|---|\n' 'keystroke "x"' $'x- |alpha|beta|\n  |---|---|\n'
+check short.md $'|a|b|c|\n|-|-|-|\n|1|2|\n' 'keystroke "x"' $'|xa|b|c|\n|-|-|-|\n|1|2||\n'
 # Cells Milkdown would rewrite keep the table raw.
 check wikicell.md $'|a|[[Wiki Link]]|\n|-|-|\n|1|2|\n' 'keystroke "x"' $'x|a|[[Wiki Link]]|\n|-|-|\n|1|2|\n'
 # Deleting forward at a hidden definition moves nothing.