[rust] Properly escape empty triple-braces

Author: jimschubert

modules/openapi-generator/src/main/resources/rust/request.rs

@@ -113,7 +113,7 @@ impl Request {
         let mut path = self.path;
         for (k, v) in self.path_params {
             // replace {id} with the value of the id path param
-            path = path.replace(&format!("{{{}}}", k), &v);
+            {{=<% %>=}}path = path.replace(&format!("{{{}}}", k), &v);<%={{ }}=%>
         }
 
         for (k, v) in self.header_params {

samples/client/petstore/rust/hyper/fileResponseTest/src/apis/request.rs

@@ -113,7 +113,7 @@ impl Request {
         let mut path = self.path;
         for (k, v) in self.path_params {
             // replace {id} with the value of the id path param
-            path = path.replace(&format!("", k), &v);
+            path = path.replace(&format!("{{{}}}", k), &v);
         }
 
         for (k, v) in self.header_params {

samples/client/petstore/rust/hyper/petstore/src/apis/request.rs

@@ -113,7 +113,7 @@ impl Request {
         let mut path = self.path;
         for (k, v) in self.path_params {
             // replace {id} with the value of the id path param
-            path = path.replace(&format!("", k), &v);
+            path = path.replace(&format!("{{{}}}", k), &v);
         }
 
         for (k, v) in self.header_params {

samples/client/petstore/rust/hyper/rust-test/src/apis/request.rs

@@ -113,7 +113,7 @@ impl Request {
         let mut path = self.path;
         for (k, v) in self.path_params {
             // replace {id} with the value of the id path param
-            path = path.replace(&format!("", k), &v);
+            path = path.replace(&format!("{{{}}}", k), &v);
         }
 
         for (k, v) in self.header_params {