Adjust wording in README slightly

Author: albertas

README.md

@@ -55,7 +55,7 @@ ignore-names-in-files = ["migrations"]
 |-------------------------------------------|------|----------------------------------------------------------------------|
 |`--fix`                                    | -    | Automatically remove detected unused code expressions from the code base. |
 |`--dry`                                    | -    | Show changes which would be made in files. |
-|`--only`                                   | list | Filenames (or path expressions), that will be reflected in the output and modified. |
+|`--only`                                   | list | Filenames (or path expressions), that will be reflected in the output (and modified if needed). |
 |`--exclude`                                | list | Filenames (or path expressions), which will be completely skipped without being analysed. |
 |`--ignore-names`                           | list | Removes provided list of names from the output. Regexp expressions to match multiple names can also be provided, e.g. `*Mixin` will match all classes ending with `Mixin`. |
 |`--ignore-names-in-files`                  | list | Ignores unused names in files, which filenames match provided path expressions. |