[CodeQuality] Fix MergeWithCallableAndWillReturnRector to add closure use() for variables nested in willReturn expr#683
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… use() for variables nested in willReturn expr Previously only a bare Variable willReturn arg got a closure use(). A variable nested inside an array (e.g. willReturn([$initialStatements, []])) was moved into the closure without a use(), producing a syntax error. Now all variables referenced in the returned expression are collected (skipping closure params and $this) and added as closure uses. Fixes #604
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Previously only a bare Variable willReturn arg got a closure use(). A variable nested inside an array (e.g. willReturn([$initialStatements, []])) was moved into the closure without a use(), producing a syntax error.
Now all variables referenced in the returned expression are collected (skipping closure params and $this) and added as closure uses.
Fixes #604