spaces were deleted after saving a document

[squeezer44]

Systemenvironment

OS: Windows 10 Pro
Installed AtomVersion: 1.33.0 x64
Installed PackageVersion: markdown-writer 2.11.6

Description of unexpected effect

Typing a few lines, put 2 spaces at the end of the last line (to initiate a newline return).
Save the file deletes the 2 spaces (and the newline return of the previous lines disappeared).

Expected behaviour

Saving the document doesn't delete the previous set newline returns.

Question

1. What occures that effect?
2. How can it be avoided?

[squeezer44]

Questions are answered:
ad 1. The atom package whitespace occured the effect. It was configured at:
removeTrailingWhitespace: true in config.cson
That occured the deletion of ending 2 whitespaces when saving a md-document.

ad 2. Can be avoided by setting removeTrailingWhitespace: false in config.cson.