refactor: for readability

[jjangga0214]

• If there are many expression(e.g. ternary operator ) in template literal, it would be a bit hard to read. So making it concise helps us.
• Also, if the template literal is to be printed on screen, it's good to be in similar form (location of line break \n or a special character like → for example) from what users actually see.
• What's more, by improving it in the manner, sometimes number of lines could be reduced, in a good way.

Therefore I refactored a little.

[aeschright]

We're going to reject this because there's an open patch on the same part of the code and it will cause conflicts. I appreciate your interest in working on the readability of the code -- feel free to look for places that in-progress work can be improved!
Ref: #61