Update src/proxywasm/utils.rs

fix extraspace

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: ruslanti

src/proxywasm/utils.rs

@@ -2,7 +2,7 @@
 //!
 
 /// Save statistics user diagnostic message.
-pub fn set_user_diag(value: &str)  {
+pub fn set_user_diag(value: &str) {
     unsafe {
         let status = super::stats_set_user_diag(value.as_ptr(), value.len());
         if status != 0 {