ReText configured for Github styles; based on http://blog.squadrainformatica.com/blog/2013/12/how-to-configure-retext-on-linux

github.css

# ~/.config/ReText project/github.css

body
{
    font-size:15px;
    line-height:1.7;
    overflow-x:hidden;

    font-family: Helvetica, arial, freesans, clean, sans-serif;
    width: 80%;
    margin: 0 auto;
}

body>:first-child
{
  margin-top:0!important;
}

body>:last-child
{
  margin-bottom:0!important;
}

blockquote,dl,ol,p,pre,table,ul {
  border: 0;
  margin: 15px 0;
  padding: 0;
}

body a {
  color: #4183c4;
  text-decoration: none;
}

body a:hover {
  text-decoration: underline;
}

body a.absent
{
  color:#c00;
}

body a.anchor
{
  display:block;
  padding-left:30px;
  margin-left:-30px;
  cursor:pointer;
  position:absolute;
  top:0;
  left:0;
  bottom:0
}

body h1,body h2,body h3,body h4,body h5,body h6{
  margin:1em 0 15px;
  padding:0;
  font-weight:bold;
  line-height:1.7;
  cursor:text;
  position:relative
}

body h1:hover a.anchor,body h2:hover a.anchor,body h3:hover a.anchor,body h4:hover a.anchor,body h5:hover a.anchor,body h6:hover a.anchor{
  text-decoration:none;
  line-height:1;
  padding-left:0;
  margin-left:-22px;
  top:15%
}

body h1:hover a.anchor .octicon-link,body h2:hover a.anchor .octicon-link,body h3:hover a.anchor .octicon-link,body h4:hover a.anchor .octicon-link,body h5:hover a.anchor .octicon-link,body h6:hover a.anchor .octicon-link{
  display:inline-block
}

body h1 tt,body h1 code,body h2 tt,body h2 code,body h3 tt,body h3 code,body h4 tt,body h4 code,body h5 tt,body h5 code,body h6 tt,body h6 code{
  font-size:inherit
}

body h1{
  font-size:2.5em;
  border-bottom:1px solid #ddd
}

body h2{
  font-size:2em;
  border-bottom:1px solid #eee
}

body h3{
  font-size:1.5em
}

body h4{
  font-size:1.2em
}

body h5{
  font-size:1em
}

body h6{
  color:#777;
  font-size:1em
}

body p,body blockquote,body ul,body ol,body dl,body table,body pre{
  margin:15px 0
}

body h1 tt,body h1 code,body h2 tt,body h2 code,body h3 tt,body h3 code,body h4 tt,body h4 code,body h5 tt,body h5 code,body h6 tt,body h6 code
{
  font-size:inherit;
}

body li p.first
{
  display:inline-block;
}

body ul,body ol
{
  padding-left:30px;
}

body ul.no-list,body ol.no-list
{
  list-style-type:none;
  padding:0;
}

body ul ul,body ul ol,body ol ol,body ol ul
{
  margin-bottom:0;
  margin-top:0;
}

body dl
{
  padding:0;
}

body dl dt
{
  font-size:14px;
  font-style:italic;
  font-weight:700;
  margin-top:15px;
  padding:0;
}

body dl dd
{
  margin-bottom:15px;
  padding:0 15px;
}

body blockquote
{
  border-left:4px solid #DDD;
  color:#777;
  padding:0 15px;
}

body blockquote>:first-child
{
  margin-top:0;
}

body blockquote>:last-child
{
  margin-bottom:0;
}

body table
{
  display:block;
  overflow:auto;
  width:100%;
}

body table th
{
  font-weight:700;
}

body table th,body table td
{
  border:1px solid #ddd;
  padding:6px 13px;
}

body table tr
{
  background-color:#fff;
  border-top:1px solid #ccc;
}

body img
{
  -moz-box-sizing:border-box;
  box-sizing:border-box;
  max-width:100%;
}

body span.frame
{
  display:block;
  overflow:hidden;
}

body span.frame>span
{
  border:1px solid #ddd;
  display:block;
  float:left;
  margin:13px 0 0;
  overflow:hidden;
  padding:7px;
  width:auto;
}

body span.frame span img
{
  display:block;
  float:left;
}

body span.frame span span
{
  clear:both;
  color:#333;
  display:block;
  padding:5px 0 0;
}

body span.align-center
{
  clear:both;
  display:block;
  overflow:hidden;
}

body span.align-center>span
{
  display:block;
  margin:13px auto 0;
  overflow:hidden;
  text-align:center;
}

body span.align-center span img
{
  margin:0 auto;
  text-align:center;
}

body span.align-right
{
  clear:both;
  display:block;
  overflow:hidden;
}

body span.align-right>span
{
  display:block;
  margin:13px 0 0;
  overflow:hidden;
  text-align:right;
}

body span.align-right span img
{
  margin:0;
  text-align:right;
}

body span.float-left
{
  display:block;
  float:left;
  margin-right:13px;
  overflow:hidden;
}

body span.float-left span
{
  margin:13px 0 0;
}

body span.float-right
{
  display:block;
  float:right;
  margin-left:13px;
  overflow:hidden;
}

body span.float-right>span
{
  display:block;
  margin:13px auto 0;
  overflow:hidden;
  text-align:right;
}

body code,body tt
{
  background-color:#f8f8f8;
  border:1px solid #ddd;
  border-radius:3px;
  margin:0 2px;
  padding:0 5px;
}

body code
{
  white-space:nowrap;
}


code,pre{
  font-family:Consolas, "Liberation Mono", Courier, monospace;
  font-size:12px
}

body pre>code
{
  background:transparent;
  border:none;
  margin:0;
  padding:0;
  white-space:pre;
}

body .highlight pre,body pre
{
  background-color:#f8f8f8;
  border:1px solid #ddd;
  font-size:13px;
  line-height:19px;
  overflow:auto;
  padding:6px 10px;
  border-radius:3px
}

body pre code,body pre tt
{
  background-color:transparent;
  border:none;
  margin:0;
  padding:0;
}

body .task-list{
  list-style-type:none;
  padding-left:10px
}

.task-list-item{
  padding-left:20px
}

.task-list-item label{
  font-weight:normal
}

.task-list-item.enabled label{
  cursor:pointer
}

.task-list-item+.task-list-item{
  margin-top:5px
}

.task-list-item-checkbox{
  float:left;
  margin-left:-20px;
  margin-top:7px
}


.highlight{
  background:#ffffff
}

.highlight .c{
  color:#999988;
  font-style:italic
}

.highlight .err{
  font-weight:bold
  border: none !important;
}

.highlight .k{
  font-weight:bold
}

.highlight .o{
  font-weight:bold
}

.highlight .cm{
  color:#999988;
  font-style:italic
}

.highlight .cp{
  color:#999999;
  font-weight:bold
}

.highlight .c1{
  color:#999988;
  font-style:italic
}

.highlight .cs{
  color:#999999;
  font-weight:bold;
  font-style:italic
}

.highlight .gd{
  color:#000000;
  background-color:#ffdddd
}

.highlight .gd .x{
  color:#000000;
  background-color:#ffaaaa
}

.highlight .ge{
  font-style:italic
}

.highlight .gr{
  color:#aa0000
}

.highlight .gh{
  color:#999999
}

.highlight .gi{
  color:#000000;
  background-color:#ddffdd
}

.highlight .gi .x{
  color:#000000;
  background-color:#aaffaa
}

.highlight .go{
  color:#888888
}

.highlight .gp{
  color:#555555
}

.highlight .gs{
  font-weight:bold
}

.highlight .gu{
  color:#800080;
  font-weight:bold
}

.highlight .gt{
  color:#aa0000
}

.highlight .kc{
  font-weight:bold
}

.highlight .kd{
  font-weight:bold
}

.highlight .kn{
  font-weight:bold
}

.highlight .kp{
  font-weight:bold
}

.highlight .kr{
  font-weight:bold
}

.highlight .kt{
  color:#445588;
  font-weight:bold
}

.highlight .m{
  color:#009999
}

.highlight .s{
  color:#d14
}

.highlight .n{
  color:#333333
}

.highlight .na{
  color:#008080
}

.highlight .nb{
  color:#0086B3
}

.highlight .nc{
  color:#445588;
  font-weight:bold
}

.highlight .no{
  color:#008080
}

.highlight .ni{
  color:#800080
}

.highlight .ne{
  color:#990000;
  font-weight:bold
}

.highlight .nf{
  color:#990000;
  font-weight:bold
}

.highlight .nn{
  color:#555555
}

.highlight .nt{
  color:#000080
}

.highlight .nv{
  color:#008080
}

.highlight .ow{
  font-weight:bold
}

.highlight .w{
  color:#bbbbbb
}

.highlight .mf{
  color:#009999
}

.highlight .mh{
  color:#009999
}

.highlight .mi{
  color:#009999
}

.highlight .mo{
  color:#009999
}

.highlight .sb{
  color:#d14
}

.highlight .sc{
  color:#d14
}

.highlight .sd{
  color:#d14
}

.highlight .s2{
  color:#d14
}

.highlight .se{
  color:#d14
}

.highlight .sh{
  color:#d14
}

.highlight .si{
  color:#d14
}

.highlight .sx{
  color:#d14
}

.highlight .sr{
  color:#009926
}

.highlight .s1{
  color:#d14
}

.highlight .ss{
  color:#990073
}

.highlight .bp{
  color:#999999
}

.highlight .vc{
  color:#008080
}

.highlight .vg{
  color:#008080
}

.highlight .vi{
  color:#008080
}

.highlight .il{
  color:#009999
}

.highlight .gc{
  color:#999;
  background-color:#EAF2F5
}

.type-csharp .highlight .k{
  color:#0000FF
}

.type-csharp .highlight .kt{
  color:#0000FF
}

.type-csharp .highlight .nf{
  color:#000000;
  font-weight:normal
}

.type-csharp .highlight .nc{
  color:#2B91AF
}

.type-csharp .highlight .nn{
  color:#000000
}

.type-csharp .highlight .s{
  color:#A31515
}

.type-csharp .highlight .sc{
  color:#A31515
}

retext

# /usr/bin/retext

#!/bin/bash
cd ~/.config/ReText\ project
/usr/share/retext/retext.py $1 &

ReText.conf

# ~/.config/ReText project/ReText.conf

[General]
autoSave=true
restorePreviewState=true
highlightCurrentLine=true
tabWidth=2
styleSheet=github.css
useWebKit=true
autoPlainText=false
previewState=true
spellCheckLocale=en_US
spellCheck=true