changed inside-out to reversed for-loop
minor grammatical change
added statement describing first list comprehension example, squared_numbers
add reference to Danny's lecture on lists
reference same names in Danny's list to keep example consistent between Parts 2 & 4
minor typo add double-quote
demo vowel_names result of for-loop example
clarify that dictionary keys are unique
use list comprehension instead of for-loop to keep consistent with the previous topic
demo result of joining the translated words from the list comprehension
use list comprehension in translate function instead of a for-loop
reverted change in translate function example due to extra credit
edit grammar in sets
minor edit
Merge branch 'part4'

Conflicts:
	part-4.ipynb