fix(shell): quote path before activating env

Resolves: #3630

poetry/utils/shell.py

@@ -65,6 +65,8 @@ class Shell:
         if WINDOWS:
             return env.execute(self.path)
 
+        import shlex
+
         terminal = Terminal()
         with env.temp_environ():
             c = pexpect.spawn(
@@ -77,7 +79,9 @@ class Shell:
         activate_script = self._get_activate_script()
         bin_dir = "Scripts" if WINDOWS else "bin"
         activate_path = env.path / bin_dir / activate_script
-        c.sendline("{} {}".format(self._get_source_command(), activate_path))
+        c.sendline(
+            "{} {}".format(self._get_source_command(), shlex.quote(str(activate_path)))
+        )
 
         def resize(sig: Any, data: Any) -> None:
             terminal = Terminal()