Read Memory Safety, Deinitialization, Strings and Characters chapters of The Swift programming language

Read again Memory Safety chapter of The Swift programming language, then chapter Deinitialization, then Strings and Characters. Some details of Multiline String Literals slippered from my mind:

// `multilineString` doesn't have line breaks
let multilineString = """
These are the same.
"""

// Multi line literal could have \ at end of each line meaning it will be no new line there 
let softWrappedQuotation = """
The White Rabbit put on his spectacles.  "Where shall I begin, \
please your Majesty?" he asked.

"Begin at the beginning," the King said gravely, "and go on \
till you come to the end; then stop."
"""

This shows strings are tricky collections:

// Concatenating two strings of length 1 creates a string of length 1
let combinedEAcuteS1: String = "\u{65}"         // e
print(combinedEAcuteS1, combinedEAcuteS1.count) // e 1
let combinedEAcuteS2: String = "\u{301}"        //  ́
print(combinedEAcuteS2, combinedEAcuteS1.count) //  ́ 1
let combinedEAcute2: String = combinedEAcuteS1 + combinedEAcuteS2
print(combinedEAcute2, combinedEAcute2.count)   // é 1