rust-clippy/tests/ui/single_char_push_str.fixed

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// run-rustfix
#![warn(clippy::single_char_push_str)]
fn main() {
let mut string = String::new();
string.push('R');
string.push('\'');
string.push('u');
string.push_str("st");
string.push_str("");
string.push('\x52');
string.push('\u{0052}');
string.push('a');
}