testdata: seed sandbox overlap child

roodboi · roodboi · commit 2ea6adaa0fbb · 2026-03-25T14:34:19.000-04:00
diff --git a/_test_data/sandbox/overlap/shared.md b/_test_data/sandbox/overlap/shared.md
@@ -6,4 +6,4 @@ Parent branch owns this section and introduces the file.
 
 ## Section B
 
-This section will be edited by the child branch.
+Child branch rewrites this section to create same-file stacked diffs without a guaranteed merge conflict.

Original file line number	Diff line number	Diff line change
`@@ -6,4 +6,4 @@ Parent branch owns this section and introduces the file.`
`6`	`6`
`7`	`7`	`## Section B`
`8`	`8`
`9`		`-This section will be edited by the child branch.`
	`9`	`+Child branch rewrites this section to create same-file stacked diffs without a guaranteed merge conflict.`