Minor corrections and suggestions (Ch 1-2)

[AshBuk]

Hi @mactsouk,

While continuing to read through the book, I collected a few items that might be worth addressing in future editions:

Typos:

• Page 44: "at" → "cat"

Style suggestions (optional, for consideration):

• Page 25: fmt.Printf() → fmt.Print()/Println() (no format specifiers needed)
• Pages 37-38: else after return could be omitted (Go early return idiom)
• Page 56-57: overflow.go demonstration code doesn't match repo version (with math.MaxInt - 100). Book version would take impractical time to execute - clarification needed.

Does this make sense and are such notes helpful?
These are just minor points - the book remains excellent overall.
Thanks!