Address PR feedback: use real copyright examples and remove extra spaces

Author: Shekhar Suman

samples/brackets/copyright-bracket-c.txt

@@ -0,0 +1 @@
+Copyright [c] 2001-2005 Python Software Foundation

src/cluecode/copyrights.py

@@ -4502,11 +4502,8 @@ def prepare_text_line(line):
 
         # normalize copyright signs, quotes and spacing around them
         .replace('"Copyright', '" Copyright')
-        
-        # normalize [C] and [c] to (c) before bracket removal
         .replace('[C]', '(c)')
         .replace('[c]', '(c)')
-        
         .replace('( C)', ' (c) ')
         .replace('(C)', ' (c) ')
         .replace('(c)', ' (c) ')

tests/cluecode/test_copyrights_basic.py

@@ -74,9 +74,9 @@ def test_prepare_text_line_normalizes_bracket_C_uppercase(self):
         assert result == '(c) The Regents of the University of Michigan and Merit Network, Inc. 1992, 1993, 1994, 1995 All Rights Reserved'
 
     def test_prepare_text_line_normalizes_bracket_c_lowercase(self):
-        cp = 'Copyright [c] 2023 Example Company'
+        cp = 'Copyright [c] 2005, 2017 by Alex McDonald (alex at rivadpm dot com)'
         result = prepare_text_line(cp)
-        assert result == 'Copyright (c) 2023 Example Company'
+        assert result == 'Copyright (c) 2005, 2017 by Alex McDonald (alex at rivadpm dot com)'
 
     def test_prepare_text_line_does_replace_copyright_signs(self):
         cp = 'Copyright \\A9 1991, 1999 Free Software Foundation, Inc.'