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This patch removes compare_left function, from the new strnatcmp function, which is never called.

For each pass of the comparison, the characters being compared can be roughly grouped as; [0], [1-9], [spaces], and [everything else].

The first two loops strip and leading [0]’s and [spaces], leaving [1-9] and [everything else].

The “process run of digits” compares only digits, which would only be [1-9]. The ‘fractional’ variable will never equal 1 (true) and compare_left is never called.