Enable output of script line for 'run' in verbose mode

Author: refack

pipenv/core.py

@@ -2303,6 +2303,8 @@ def do_run(command, args, three=None, python=False, pypi_mirror=None):
     inline_activate_virtual_environment()
     try:
         script = project.build_script(command, args)
+        cmd_string = ' '.join([script.command] + script.args)
+        logging.getLogger("pip").info("Run: '{0}'".format(cmd_string))
     except ScriptEmptyError:
         click.echo("Can't run script {0!r}-it's empty?", err=True)
     if os.name == "nt":