docs(dog-years): correct grammar

subjects/dog-years/README.md

@@ -2,20 +2,19 @@
 
 ### Instructions
 
-Someone once said that a dog makes 7 years for each human year.
+Someone once said that a human year is equal to 7 dog years.
 
-Create a `dogYears` function that if given a planet name and an age in seconds,
-calculates how old a dog would be on the given planet.
+Create a function named `dogYears`, that accepts the name of a planet, and the age of the dog in seconds. Your function should return the age of the dog on that planet in dog years.
 
-- `earth` : orbital period 1.0 Earth years, 365.25 Earth days, or 31,557,600 seconds
-- `mercury` : orbital period 0.2408467 Earth years
-- `venus` : orbital period 0.61519726 Earth years
-- `mars` : orbital period 1.8808158 Earth years
-- `jupiter` : orbital period 11.862615 Earth years
-- `saturn` : orbital period 29.447498 Earth years
-- `uranus` : orbital period 84.016846 Earth years
-- `neptune` : orbital period 164.79132 Earth years
+- `earth`: orbital period 1.0 Earth years, 365.25 Earth days, or 31,557,600 seconds.
+- `mercury`: orbital period 0.2408467 Earth years.
+- `venus`: orbital period 0.61519726 Earth years.
+- `mars`: orbital period 1.8808158 Earth years.
+- `jupiter`: orbital period 11.862615 Earth years.
+- `saturn`: orbital period 29.447498 Earth years.
+- `uranus`: orbital period 84.016846 Earth years.
+- `neptune`: orbital period 164.79132 Earth years.
 
-So if you were told someone that their dog were 1,000,000,000 seconds old, you should be able to say that the dog is 221.82 Earth-years old.
+If you were told that a dog was 1,000,000,000 seconds old, you should calculate that the dog would be 221.82 Earth-years old.
 
 You will have to format the number so that the result is rounded like the example above.