Atom text editor remove trailing whitespace on save

I use Sublime text. Now I am trying Atom. When I save any file in sublime text it does not include any trailing blank line. But saving any file in Atom leaves a trailing blank line. How do I force Atom not to leave trailing white spaces?

Under your Atom Preferences go to Packages tab and search for whitespace. Click on the whitespace package and uncheck Ensure Single Trailing Newline option

On global level this can be changed using settings in Whitespace package, but if you want to disable it for a specific language you have to use syntax-scoped properties in your config.cson.

'.text.html.php': # php overrides
  whitespace:
    ensureSingleTrailingNewline: false
    removeTrailingWhitespace: false
    
'.source.ruby': # ruby overrides
  whitespace:
    ensureSingleTrailingNewline: false
    removeTrailingWhitespace: false

To see the scope of language go to Packages tab and search for your language.

Click on the settings of the language package and you can see the scope:

Go to packages and find "whitespace", go to it's settings and uncheck the last checkbox.

Settings

Checkbox

To add to Dan Moldavan's answer.

I experienced this issue when working on a Rails Application.

I added a .editorconfig file with the following properties:

# editorconfig.org

root = true

[*]
charset = utf-8
end_of_line = lf
indent_size = 2
indent_style = space
insert_final_newline = true
trim_trailing_whitespace = true

[*.md]
trim_trailing_whitespace = false

And I added a .gitattributes file with the following properties:

# Enforce Unix newlines
* text=auto eol=lf

And then my Atom Editor threw a problem:

> 1 problem affecting .gitattributes

> whitespace: It is possible that the "whitespace"-package prevents the following properties from working reliably: insert_final_newline, trim_trailing_whitespace. You may try reconfiguring or disabling the "whitespace"-package to solve regarding issues.

Here's how I fixed it:

• Open your Atom Editor
• Go to Edit > Preferences > Packages
• Type in whitespace
• Click on the package that shows up
• Untick the following:
  • Ensure Single Trailing Newline
  • Ignore Whitespace On Current Line
• Leave Ignore Whitespace Only Lines unticked

Save and close the settings.

That's all.

I hope this helps