repeat phone number in header, next to back button

1. Putting it near the back-button suggests the user can change it by
   going back.

2. The existing title "Verify" didn't add any value.

// FREEBIE

Signal/src/ViewControllers/CodeVerificationViewController.m

@@ -104,7 +104,7 @@ NSString *const kCompletedRegistrationSegue = @"CompletedRegistration";
 
     UILabel *titleLabel = [UILabel new];
     titleLabel.textColor = [UIColor whiteColor];
-    titleLabel.text = NSLocalizedString(@"VERIFICATION_HEADER", @"Navigation title in the registration flow - during the sms code verification process.");
+    titleLabel.text = [self phoneNumberText];
     titleLabel.font = [UIFont ows_mediumFontWithSize:20.f];
     [header addSubview:titleLabel];
     [titleLabel autoPinToTopLayoutGuideOfViewController:self withInset:0];
@@ -231,12 +231,18 @@ NSString *const kCompletedRegistrationSegue = @"CompletedRegistration";
     [_requestCallSpinner autoPinEdgeToSuperviewEdge:ALEdgeRight withInset:kSpinnerSpacing];
 }
 
-- (void)updatePhoneNumberLabel {
+- (NSString *)phoneNumberText
-    NSString *phoneNumber = [PhoneNumber bestEffortFormatPartialUserSpecifiedTextToLookLikeAPhoneNumber:[TSAccountManager localNumber]];
+{
     OWSAssert([TSAccountManager localNumber] != nil);
-    _phoneNumberLabel.text = [NSString stringWithFormat:NSLocalizedString(@"VERIFICATION_PHONE_NUMBER_FORMAT",
+    return [PhoneNumber bestEffortFormatPartialUserSpecifiedTextToLookLikeAPhoneNumber:[TSAccountManager localNumber]];
-                                                                         @"Label indicating the phone number currently being verified."),
+}
-                             phoneNumber];
+
+- (void)updatePhoneNumberLabel
+{
+    _phoneNumberLabel.text =
+        [NSString stringWithFormat:NSLocalizedString(@"VERIFICATION_PHONE_NUMBER_FORMAT",
+                                       @"Label indicating the phone number currently being verified."),
+                  [self phoneNumberText]];
 }
 
 - (void)startActivityIndicator

Signal/translations/en.lproj/Localizable.strings

@@ -130,7 +130,7 @@
 /* The title of the 'user blocked' alert. */
 "BLOCK_LIST_VIEW_BLOCKED_ALERT_TITLE" = "User Blocked";
 
-/* The title of the 'You can't block yourself' alert. */
+/* The message of the 'You can't block yourself' alert. */
 "BLOCK_LIST_VIEW_CANT_BLOCK_SELF_ALERT_MESSAGE" = "You can't block yourself.";
 
 /* The title of the 'You can't block yourself' alert. */
@@ -1084,9 +1084,6 @@
 /* button text during registration to submit your SMS verification code */
 "VERIFICATION_CHALLENGE_SUBMIT_CODE" = "Submit Verification Code";
 
-/* Navigation title in the registration flow - during the sms code verification process. */
-"VERIFICATION_HEADER" = "Verify";
-
 /* Label indicating the phone number currently being verified. */
 "VERIFICATION_PHONE_NUMBER_FORMAT" = "Enter the verification code we sent to %@.";