Fix test

Author: utpilla

opentelemetry-proto/tests/grpc_build.rs

@@ -130,13 +130,12 @@ fn build_content_map(path: impl AsRef<Path>, normalize_line_feed: bool) -> HashM
         .collect()
 }
 
-///  Returns a String with the platform specific new line feed character.
+///  Returns a String which uses the platform specific new line feed character.
 fn get_platform_specific_string(input: String) -> String {
-    if cfg!(windows) {
-        input.replace('\n', "\r\n")
-    } else {
-        input
+    if cfg!(windows) && !input.ends_with("\r\n") && input.ends_with('\n') {
+        return input.replace('\n', "\r\n");
     }
+    input
 }
 
 fn ensure_files_are_same(