Problem with wp-includes/category-template.php

I tried to edit the category-template.php file to change the tag cloud function on line 523. All I changed was the numbers of:
‘largest’ and ‘number’
‘smallest’ => 8, ‘largest’ => 22, ‘unit’ => ‘pt’, ‘number’ => 45,

Now I get the error message:
Parse error: syntax error, unexpected ‘<‘ in /public_html/wp-includes/category-template.php on line 676

When I tried to use my backup file, I still get the same error message.
Is there something I can do or is there a way to get a clean copy of the category-template.php file?

Thanks,sorry for the double post, I couldn’t figure out how to remove the other post.
Jim

Update, I added a new copy of category-template.php and now I get the error message:

Fatal error: Only variables can be passed by reference in /public_html/wp-includes/category-template.php on line 675

Here is line 675:
str_replace( ‘,’, ‘,’,’,’.’, ( $smallest + ( ( $count – $min_count ) * $font_step ) ) )