fix: Resolve bug in header parsing when parsing multi-item headers

Author: dsteeley

modules/openapi-generator/src/main/resources/rust-server/models.mustache

@@ -653,7 +653,7 @@ impl std::convert::TryFrom<hyper::header::HeaderValue> for header::IntoHeaderVal
         match hdr_values.to_str() {
             std::result::Result::Ok(hdr_values) => {
                 let hdr_values : std::vec::Vec<{{{classname}}}> = hdr_values
-                .split(',')
+                .split(", ")
                 .filter_map(|hdr_value| match hdr_value.trim() {
                     "" => std::option::Option::None,
                     hdr_value => std::option::Option::Some({

samples/server/petstore/rust-server/output/multipart-v3/src/models.rs

@@ -166,7 +166,7 @@ impl std::convert::TryFrom<hyper::header::HeaderValue> for header::IntoHeaderVal
         match hdr_values.to_str() {
             std::result::Result::Ok(hdr_values) => {
                 let hdr_values : std::vec::Vec<MultipartRelatedRequest> = hdr_values
-                .split(',')
+                .split(", ")
                 .filter_map(|hdr_value| match hdr_value.trim() {
                     "" => std::option::Option::None,
                     hdr_value => std::option::Option::Some({
@@ -338,7 +338,7 @@ impl std::convert::TryFrom<hyper::header::HeaderValue> for header::IntoHeaderVal
         match hdr_values.to_str() {
             std::result::Result::Ok(hdr_values) => {
                 let hdr_values : std::vec::Vec<MultipartRequestObjectField> = hdr_values
-                .split(',')
+                .split(", ")
                 .filter_map(|hdr_value| match hdr_value.trim() {
                     "" => std::option::Option::None,
                     hdr_value => std::option::Option::Some({
@@ -504,7 +504,7 @@ impl std::convert::TryFrom<hyper::header::HeaderValue> for header::IntoHeaderVal
         match hdr_values.to_str() {
             std::result::Result::Ok(hdr_values) => {
                 let hdr_values : std::vec::Vec<MultipleIdenticalMimeTypesPostRequest> = hdr_values
-                .split(',')
+                .split(", ")
                 .filter_map(|hdr_value| match hdr_value.trim() {
                     "" => std::option::Option::None,
                     hdr_value => std::option::Option::Some({

samples/server/petstore/rust-server/output/no-example-v3/src/models.rs

@@ -146,7 +146,7 @@ impl std::convert::TryFrom<hyper::header::HeaderValue> for header::IntoHeaderVal
         match hdr_values.to_str() {
             std::result::Result::Ok(hdr_values) => {
                 let hdr_values : std::vec::Vec<OpGetRequest> = hdr_values
-                .split(',')
+                .split(", ")
                 .filter_map(|hdr_value| match hdr_value.trim() {
                     "" => std::option::Option::None,
                     hdr_value => std::option::Option::Some({