My Atom editor settings. Context & screenshot: https://twitter.com/mieky/status/504594698586308608

config.cson

'editor':
  'lineHeight': 1.45
  'softWrap': true
  'normalizeIndentOnPaste': true
  'tabLength': 2
  'preferredLineLength': 100
  'invisibles':
    'cr': '↩'
    'eol': ''
    'space': '·'
    'tab': '⇥'
  'showInvisibles': true
'core':
  'themes': [
    'atom-dark-ui'
    'itg-dark-syntax'
  ]
'welcome':
  'showOnStartup': false
'whitespace':
  'removeTrailingWhitespace': true
  'ensureSingleTrailingNewline': true

styles.less

/*
 * @mieky's Atom Stylesheet, based on @viljamis's
 * (https://gist.github.com/viljamis/e9d80958d00ed7f9c746)
 *
 * This stylesheet is loaded when Atom starts up and is reloaded automatically
 * when it is changed.
 */

/* CODE EDITOR
------------------ */
 .editor {
   font-family: 'Input Mono';
   font-weight: 400;
   font-size: 14px;
   .invisible-character {
     color: #282c48;
   }
   line-height: 1.2;
 }

 /* TOP TABS
 ------------------ */
 .tab {
   font-family: 'Input Sans';
   font-size: 11px !important;
   letter-spacing: -0.3px;
 }

/* SIDEBAR
------------------- */
.tree-view {
  font-family: 'Input Sans';
  .entry.directory.status-modified > .header,
  .entry.file.status-modified {
    color: #ff6300;
  }
  .list-item {
      font-size: 12px !important;
  }
  .header:before {
    opacity: .7;
    margin-right: 0 !important;
  }
}