melib: update to 2021 edition

Signed-off-by: Manos Pitsidianakis <manos@pitsidianak.is>

Cargo.toml

@@ -1,4 +1,5 @@
 [workspace]
+resolver = "2"
 
 members = [
     "meli",

melib/Cargo.toml

@@ -2,7 +2,7 @@
 name = "melib"
 version = "0.8.0"
 authors = ["Manos Pitsidianakis <manos@pitsidianak.is>"]
-edition = "2018"
+edition = "2021"
 build = "build.rs"
 rust-version = "1.65.0"
 

melib/src/gpgme/io.rs

@@ -149,7 +149,6 @@ impl Write for Data {
 impl Seek for Data {
     #[inline]
     fn seek(&mut self, pos: io::SeekFrom) -> io::Result<u64> {
-        use std::convert::TryInto;
         let (off, whence) = match pos {
             io::SeekFrom::Start(off) => (off.try_into().unwrap_or(i64::MAX), libc::SEEK_SET),
             io::SeekFrom::End(off) => (off.saturating_abs(), libc::SEEK_END),

melib/src/imap/mod.rs

@@ -1216,7 +1216,6 @@ impl MailBackend for ImapType {
 
             for l in response.split_rn() {
                 if l.starts_with(b"* SEARCH") {
-                    use std::iter::FromIterator;
                     let uid_index = uid_store.uid_index.lock()?;
                     return Ok(SmallVec::from_iter(
                         String::from_utf8_lossy(l[b"* SEARCH".len()..].trim())

melib/src/text_processing/line_break.rs

@@ -1091,7 +1091,6 @@ pub fn split_lines_reflow(text: &str, reflow: Reflow, width: Option<usize>) -> V
                         continue;
                     }
                     let segment_tree = {
-                        use std::iter::FromIterator;
                         let mut t: smallvec::SmallVec<[usize; 1024]> =
                             smallvec::SmallVec::from_iter(std::iter::repeat(0).take(line.len()));
                         for (idx, _g) in UnicodeSegmentation::grapheme_indices(line, true) {
@@ -1568,7 +1567,6 @@ impl Iterator for LineBreakText {
                                 ),
                                 prev_break: 0,
                                 segment_tree: {
-                                    use std::iter::FromIterator;
                                     let mut t: smallvec::SmallVec<[usize; 1024]> =
                                         smallvec::SmallVec::from_iter(
                                             std::iter::repeat(0).take(line.len()),

melib/src/utils/shellexpand.rs

@@ -69,7 +69,7 @@ impl ShellExpandTrait for Path {
 
     #[cfg(target_os = "linux")]
     fn complete(&self, force: bool) -> SmallVec<[String; 128]> {
-        use std::{convert::TryFrom, os::unix::io::AsRawFd};
+        use std::os::unix::io::AsRawFd;
 
         use libc::dirent64;
         use nix::fcntl::OFlag;