Sublime Text has options trim_trailing_white_space_on_save and ensure_newline_at_eof_on_save to handle whitespace. In some situations, these options do not give satisfactory result. While similar packages exist, e.g., TrailSpaces, they do not allow easier syntax specific settings. Whitespace helps in keeping your code clean by providing more features in removing trailing spaces.

• remove trailing whitespace
• ensure single trailing newline
• ignore whitespace only lines
• ignore whitespace on current line

1. Download & Install Sublime Text 3 (https://www.sublimetext.com/3)
2. Go to the menu Tools -> Install Package Control, then, wait few seconds until the installation finishes up
3. Now, Go to the menu Preferences -> Package Control
4. Type Add Channel on the opened quick panel and press Enter
5. Then, input the following address and press Enter

   https://raw.githubusercontent.com/evandrocoan/StudioChannel/master/channel.json
   

6. Go to the menu Tools -> Command Palette... (Ctrl+Shift+P)
7. Type Preferences: Package Control Settings – User on the opened quick panel and press Enter
8. Then, find the following setting on your Package Control.sublime-settings file:

   "channels":
   [
       "https://packagecontrol.io/channel_v3.json",
       "https://raw.githubusercontent.com/evandrocoan/StudioChannel/master/channel.json",
   ],

9. And, change it to the following, i.e., put the https://raw.githubusercontent... line as first:

   "channels":
   [
       "https://raw.githubusercontent.com/evandrocoan/StudioChannel/master/channel.json",
       "https://packagecontrol.io/channel_v3.json",
   ],

   • The https://raw.githubusercontent... line must to be added before the https://packagecontrol.io... one, otherwise, you will not install this forked version of the package, but the original available on the Package Control default channel https://packagecontrol.io...
10. Now, go to the menu Preferences -> Package Control
11. Type Install Package on the opened quick panel and press Enter
12. Then, search for Whitespace and press Enter

See also:

1. ITE - Integrated Toolset Environment
2. Package control docs for details.

• The easiest way to apply "remove trailing whitespace" is by Command Palette C+Shift+P.

• To activate "remove trailing whitespace on save", click the menu items in Edit -> Whitespace.

• To enable Whitespace at startup, modify your preference setting file. If you want to enable Whitespace for a specific syntax, edit Preferences -> Settings - More -> Syntax Specific:

{
    "remove_trailing_whitespace_on_save": true,
    "ensure_single_trailing_newline": true,
    "ignore_whitespace_only_lines": false,
    "ignore_whitespace_on_current_line": true
}

The options explain themselves. Their default values are false. You can also make use of Syntax Manager to enable Whitespace for multiple syntaxes.