Fix usage message

README.md

@@ -3,7 +3,7 @@ Substitute every match of a regex in multiple files - with confirmation prompts.
 ```
 subprompt [REGEX] [SUB] [FILES...]
 ```
-Install through PyPi:
+Install it through PyPi:
 ```
 python3.9 -m pip install subprompt
 ```

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = subprompt
-version = 0.0.3
+version = 0.0.4
 author = Augusto Lenz Gunsch
 author_email = augusto@augustogunsch.com
 description = Substitute Regex in files with prompt confirmation

src/subprompt/subprompt.py

@@ -26,7 +26,6 @@ import re
 import hashlib
 import os
 from sys import argv, stderr
-from os.path import basename
 from colorama import init, Fore, Back, Style
 
 init(autoreset=True)
@@ -124,7 +123,7 @@ class Filter:
 
 def run(args):
     if len(args) < 3:
-        print('usage: {0} [REGEX] [SUB] [FILES...]'.format(basename(__file__)), file=stderr)
+        print('usage: subprompt [REGEX] [SUB] [FILES...]', file=stderr)
         exit(1)
 
     regex = args[0]