How to reset to the default font size of Apple Dictionary

Apple Dictonary on MacOS has an invisible font size gauge:

1 2 3 [4] 5 6 7 8 9 10
The default is 4.

To reset to the default (4)
1. Minimize font size with the smaller A icon.
2. Click the bigger A icon 3 times.

How to prevent Atom from removing duplicated empty line breaks

By default Atom Editor (https://atom.io/) removes redundant empty line breaks at the bottom. It makes a diff on Git unintentionally.

A solution for it is to switch off 'Ensure Single Trailing NewLine' of Whitespace package.

Cheers