fix(mailer): Use `monospace` for the unblock code for better legibility.

In the write-to-disk script, print some characters that are similar
to see how they appear using the fonts.

partials/unblock_code.html

@@ -14,7 +14,7 @@
     <p style="font-family: sans-serif; font-size: 14px; font-weight: normal; margin: 0 0 24px 0; text-align: center;">
     {{t "If yes, here is the authorization code you need:" }}
     </p>
-    <p style="font-family: sans-serif; font-size: 18px; font-weight: normal; margin: 0 0 24px 0; text-align: center;">
+    <p style="font-family: monospace !important; font-size: 18px; font-weight: normal; margin: 0 0 24px 0; text-align: center;">
     {{ unblockCode }}
     </p>
   </td>

scripts/write-to-disk.js

@@ -101,7 +101,7 @@ function sendMail(mailer, messageToSend) {
     uaBrowserVersion: '51',
     uaOS: 'Mac OSX',
     uaOSVersion: '10.11',
-    unblockCode: '12AZ5P33',
+    unblockCode: '1ILO0Z5P',
     uid: '6510cb04abd742c6b3e4abefc7e39c9f'
   }
 

templates/unblock_code.html

@@ -34,7 +34,7 @@
     <p style="font-family: sans-serif; font-size: 14px; font-weight: normal; margin: 0 0 24px 0; text-align: center;">
     {{t "If yes, here is the authorization code you need:" }}
     </p>
-    <p style="font-family: sans-serif; font-size: 18px; font-weight: normal; margin: 0 0 24px 0; text-align: center;">
+    <p style="font-family: monospace !important; font-size: 18px; font-weight: normal; margin: 0 0 24px 0; text-align: center;">
     {{ unblockCode }}
     </p>
   </td>