Fix review comments

Author: omjavaid

litsupport/modules/timeit.py

@@ -56,7 +56,8 @@ def _mutateCommandLine(context, commandline):
         args += ["--redirect-input", stdin]
         cmd.stdin = None
     else:
-        args += ["--redirect-input", "/dev/null"] if os.name != 'nt' else []
+        if os.name != 'nt':
+            args += ["--redirect-input", "/dev/null"]
     if workdir is not None:
         args += ["--chdir", workdir]
         cmd.workdir = None

litsupport/shellcommand.py

@@ -88,7 +88,8 @@ def parse(commandline):
     and will throw an exception if the commandline uses unsupported features.
     """
     result = ShellCommand()
-    commandline = commandline.replace("\\", "/") if os.name == 'nt' else commandline
+    if os.name == 'nt':
+        commandline = commandline.replace("\\", "/")
     tokens = shlex.split(commandline)
     i = 0
     first_word = True