Clippy fixes

src/platform/linux/signal.rs

@@ -22,13 +22,11 @@ impl PalSignal for Sys {
 
     fn raise(sig: c_int) -> c_int {
         let tid = e(unsafe { syscall!(GETTID) }) as pid_t;
-        let ret = if tid == !0 {
+        if tid == !0 {
             -1
         } else {
             e(unsafe { syscall!(TKILL, tid, sig) }) as c_int
-        };
-
-        ret
+        }
     }
 
     unsafe fn sigaction(sig: c_int, act: *const sigaction, oact: *mut sigaction) -> c_int {

src/platform/mod.rs

@@ -103,7 +103,7 @@ impl Write for StringWriter {
                 ptr::copy_nonoverlapping(buf.as_ptr(), self.0, copy_size);
                 self.1 -= copy_size;
 
-                self.0 = self.0.offset(copy_size as isize);
+                self.0 = self.0.add(copy_size);
                 *self.0 = 0;
             }
 
@@ -136,8 +136,8 @@ impl Write for UnsafeStringWriter {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
         unsafe {
             ptr::copy_nonoverlapping(buf.as_ptr(), self.0, buf.len());
-            *self.0.offset(buf.len() as isize) = b'\0';
-            self.0 = self.0.offset(buf.len() as isize);
+            self.0 = self.0.add(buf.len());
+            *self.0 = b'\0';
         }
         Ok(buf.len())
     }

src/platform/rlb.rs

@@ -23,7 +23,7 @@ pub enum Line<'a> {
 impl RawLineBuffer {
     pub const fn new(fd: c_int) -> Self {
         Self {
-            fd: fd,
+            fd,
             buf: Vec::new(),
             newline: None,
             read: 0,