Apply more formatting fixes

Co-Authored-By: Ralf Jung <post@ralfj.de>

Author: Aaron1011

src/shims/foreign_items.rs

@@ -294,7 +294,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
                 match this.read_scalar(args[0])?.to_usize(this)? {
                     id if id == sys_getrandom => {
                         // The first argument is the syscall id,
-                        // so skip over it
+                        // so skip over it.
                         linux_getrandom(this, &args[1..], dest)?;
                     }
                     id => {
@@ -968,7 +968,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
     }
 }
 
-// Shims the linux 'getrandom()' syscall
+// Shims the linux 'getrandom()' syscall.
 fn linux_getrandom<'tcx>(
     this: &mut MiriEvalContext<'_, 'tcx>,
     args: &[OpTy<'tcx, Tag>],
@@ -978,7 +978,7 @@ fn linux_getrandom<'tcx>(
     let len = this.read_scalar(args[1])?.to_usize(this)?;
 
     // The only supported flags are GRND_RANDOM and GRND_NONBLOCK,
-    // neither of which have any effect on our current PRNG
+    // neither of which have any effect on our current PRNG.
     let _flags = this.read_scalar(args[2])?.to_i32()?;
 
     this.gen_random(ptr, len as usize)?;