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Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →

instance method

StringIO#lineno=

lineno = new_line_number → new_line_number

Sets the current line number in self to the given new_line_number; see Line Number.

See also #lineno #pid #length #pos also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0