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fix typos in backtrack.rs #328

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Jan 19, 2017
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2 changes: 1 addition & 1 deletion src/backtrack.rs
Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@
// regexes on small inputs because of its memory requirements.
//
// In particular, this is a *bounded* backtracking engine. It retains worst
// case linear time by keeping track of the states that is has visited (using a
// case linear time by keeping track of the states that it has visited (using a
// bitmap). Namely, once a state is visited, it is never visited again. Since a
// state is keyed by `(instruction index, input index)`, we have that its time
// complexity is `O(mn)` (i.e., linear in the size of the search text).
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