Added a solution. Please let me know if this is submitted incorrectly or in the wrong location.
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If your pull request closes a GitHub issue, replace the XXXXX below with the issue number.
Closes #XXXXX
* Added missing space
* Added missing period in add-borders-around-your-elements.md
* Added missing space in adjust-the-padding-of-an-element.english.md
* Clarification of the declaration order overriding
Previous text was talking about an override but it may also confuse readers that the override was done in the order of the listing of class names inside the h1.
I also added an extra case to better clarify the situation.
* Small change mentioning the order of declaration
Missed an order of declaration emphasis on my previous commit, adding it on this one.
