Fix typos in usage message and comments across multiple files

cmd/phoneparser/main.go

@@ -10,7 +10,7 @@ import (
 
 func main() {
 	if len(os.Args) != 3 {
-		fmt.Println("usage: phoneparser [number] [two letter coutry]")
+		fmt.Println("usage: phoneparser [number] [two letter country]")
 		os.Exit(1)
 	}
 

insertablebuffer.go

@@ -63,7 +63,7 @@ func (b *Builder) Truncate(n int) {
 	b.lastRead = opInvalid
 	switch {
 	case n < 0 || n > b.Len():
-		// Originall this was a panic, but I hate panicing (hehe),
+		// Originally this was a panic, but I hate panicking (hehe),
 		// so instead let's just ignore this issue.
 		// panic("bytes.Buffer: truncation out of range")
 		return

phonenumbers.go

@@ -2461,7 +2461,7 @@ func testNumberLength(number string, metadata *PhoneMetadata, numberType PhoneNu
 
 	actualLength := int32(len(number))
 
-	// This is safe because there is never an overlap beween the possible lengths and the local-only
+	// This is safe because there is never an overlap between the possible lengths and the local-only
 	// lengths; this is checked at build time.
 	for _, l := range localLengths {
 		if l == actualLength {
@@ -3394,7 +3394,7 @@ func IsMobileNumberPortableRegion(regionCode string) bool {
 
 // GetTimezonesForPrefix returns a slice of Timezones corresponding to the number passed
 // or error when it is impossible to convert the string to int
-// The algorythm tries to match the timezones starting from the maximum
+// The algorithm tries to match the timezones starting from the maximum
 // number of phone number digits and decreasing until it finds one or reaches 0
 func GetTimezonesForPrefix(number string) ([]string, error) {
 	var err error

phonenumbers_test.go

@@ -122,7 +122,7 @@ func TestExtractPossibleNumber(t *testing.T) {
 	assert.Equal(t, "530) 583-6985 x302", extractPossibleNumber("(530) 583-6985 x302/x2303")) // yes, the leading '(' is missing
 }
 
-func TestIsViablePhoneNumer(t *testing.T) {
+func TestIsViablePhoneNumber(t *testing.T) {
 	var tests = []struct {
 		input    string
 		isViable bool