Project-wide editing

An additional facility that would be a very great help sometimes would be if we could search-and-replace text strings, not just in the currently-being-edited file, but in ALL project source files, in a single operation.

I so often find, in developing a large-ish project, that problems I had not realised I would encounter when I planned my data structures, variable names and array names, make me wish I had not used some of those names already, and I end up having to trawl laboriously through many source files to re-arrance the names I have allocated to everything.
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John