Description of the change: Guidance added: "When writing the URL, always include the preceding 'http://' or 'https://'."
Typo corrected.
Prefix 'https://' added to URLs.
Description of the change: Heading 'Numbers with five or more digits' changed to 'Numbers with four or more digits' to fit examples.
Changed 'h' to 'hours' in correct example of ranges of numbers.