lib: replace string concatenation with template

PR-URL: #16917 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>

Author: subbachari

lib/_http_agent.js

@@ -127,10 +127,10 @@ Agent.prototype.getName = function getName(options) {
  // Pacify parallel/test-http-agent-getname by only appending
  // the ':' when options.family is set.
  if (options.family === 4 || options.family === 6)
- name += ':' + options.family;
+ name += `:${options.family}`;
 
  if (options.socketPath)
- name += ':' + options.socketPath;
+ name += `:${options.socketPath}`;
 
  return name;
 };