Copyright Mozilla Foundation

Licensed under the Apache License (Version 2.0), or the MIT license,
(the "Licenses") at your option. You may not use this file except in
compliance with one of the Licenses. You may obtain copies of the
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   https://www.apache.org/licenses/LICENSE-2.0
   https://opensource.org/licenses/MIT

Unless required by applicable law or agreed to in writing, software
distributed under the Licenses is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the Licenses for the specific language governing permissions and
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--

Test code is dedicated to the Public Domain when so designated (see
the individual files for PD/CC0-dedicated sections).

--

The implementation for Utf8CharIndices was adapted from the
CharIndices implementation of the Rust standard library at revision
ab32548539ec38a939c1b58599249f3b54130026
(https://github.com/rust-lang/rust/blob/ab32548539ec38a939c1b58599249f3b54130026/library/core/src/str/iter.rs).

Excerpt from https://github.com/rust-lang/rust/blob/ab32548539ec38a939c1b58599249f3b54130026/COPYRIGHT ,
which refers to
https://github.com/rust-lang/rust/blob/ab32548539ec38a939c1b58599249f3b54130026/LICENSE-APACHE
and
https://github.com/rust-lang/rust/blob/ab32548539ec38a939c1b58599249f3b54130026/LICENSE-MIT
:

For full authorship information, see the version control history or
https://thanks.rust-lang.org

Except as otherwise noted (below and/or in individual files), Rust is
licensed under the Apache License, Version 2.0 <LICENSE-APACHE> or
<http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
<LICENSE-MIT> or <http://opensource.org/licenses/MIT>, at your option.
