Steps to reproduce:

• Ask a question
• Press space to see more choices
• Find a question with no answers
• Press space on the empty answer list

TypeError: Cannot read property 'body_markdown' of undefined
    at Object.showAnswer (/usr/local/lib/node_modules/how2/lib/ui.js:177:46)
    at /usr/local/lib/node_modules/how2/lib/how2.js:120:20
    at ScrollableBox.<anonymous> (/usr/local/lib/node_modules/how2/lib/ui.js:151:9)
    at ScrollableBox.EventEmitter._emit (/usr/local/lib/node_modules/how2/node_modules/blessed/lib/events.js:94:20)
    at ScrollableBox.EventEmitter.emit (/usr/local/lib/node_modules/how2/node_modules/blessed/lib/events.js:117:12)
    at ScrollableBox.List.enterSelected (/usr/local/lib/node_modules/how2/node_modules/blessed/lib/widgets/list.js:586:8)
    at ScrollableBox.<anonymous> (/usr/local/lib/node_modules/how2/lib/ui.js:155:21)
    at ScrollableBox.EventEmitter._emit (/usr/local/lib/node_modules/how2/node_modules/blessed/lib/events.js:94:20)
    at ScrollableBox.EventEmitter.emit (/usr/local/lib/node_modules/how2/node_modules/blessed/lib/events.js:117:12)
    at Program.<anonymous> (/usr/local/lib/node_modules/how2/node_modules/blessed/lib/widgets/screen.js:603:15)

Fix: #64

To reproduce the problem I used this question:

./bin/how2 docker compose create containers

(second question has no answers)