You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
File ToolsArea: what it touches
New FeaturesKind: in v2.1.251,
What probably matters to youSection of the release
What
Both tools now hold an open handle, read the current contents and re-check them immediately before the write lands, narrowing the window in which a file could change between being read and being overwritten.
Details
the handle is closed once the write completes
applies to every Write and NotebookEdit call, with no setting involved
Evidence
recheckBeforeWrite
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
