Add an underscore.

Co-authored-by: Chris Denton <[email protected]>

Author: smmalis37

library/std/src/sys/windows/os.rs

@@ -322,7 +322,7 @@ pub fn temp_dir() -> PathBuf {
 fn home_dir_crt() -> Option<PathBuf> {
     unsafe {
         // Defined in processthreadsapi.h.
-        const CURRENT_PROCESS_TOKEN: usize = -4isize as usize;
+        const CURRENT_PROCESS_TOKEN: usize = -4_isize as usize;
 
         super::fill_utf16_buf(
             |buf, mut sz| {