jekyll: streamline installation instructions

Readme.md

@@ -24,6 +24,7 @@
 `pre` supports these:
 
     {: .-setup}
+    {: .-box-chars}
 
 `ul` supports these:
 

_sass/2017/markdown/code.scss

@@ -8,6 +8,11 @@
   font-family: $monospace-font;
 }
 
+// Reduce line height for box drawing characters
+.MarkdownBody pre.-box-chars {
+  line-height: 1.32;
+}
+
 /*
  * Undo prism theme crap
  */

cron.md

@@ -28,7 +28,7 @@ Min  Hour Day  Mon  Weekday
 │    └────────────────  Hour     (0..23)
 └─────────────────────  Minute   (0..59)
 ```
-{: .-setup}
+{: .-setup.-box-chars}
 
 ### Examples
 

jekyll.md

@@ -3,8 +3,9 @@ title: Jekyll
 jekyll_escape: true
 layout: 2017/sheet
 tags: [Featured]
+prism_languages: [bash, yaml, html, ruby]
 category: Jekyll
-updated: 2017-08-26
+updated: 2017-09-01
 ---
 
 {% raw %}
@@ -19,24 +20,12 @@ gem install jekyll bundler
 ```bash
 # Create a new site at `./myblog`
 jekyll new myblog
-```
-
-```bash
 cd myblog
-bundle exec jekyll serve
-```
-
-See: [Jekyll quickstart](http://jekyllrb.com/docs/quickstart/)
-
-### Installation (GitHub pages version)
-
-```bash
-# Requires bundler
-gem install bundler
 ```
 
 ```bash
-# Build the Gemfile
+# Optional: if you're targeting github-pages,
+# use this Gemfile instead.
 cat > Gemfile <<-END
 source 'https://rubygems.org'
 gem 'github-pages', group: :jekyll_plugins
@@ -44,20 +33,15 @@ END
 ```
 
 ```bash
-# Install gems
-bundle
-```
-
-```bash
-# Start server
 bundle exec jekyll serve
 ```
 
-This is the recommended setup, especially if you're using GitHub pages.
+See: [Jekyll quickstart](http://jekyllrb.com/docs/quickstart/)<br>
 See: [github/pages-gem](https://github.com/github/pages-gem)
 
 ### Directories
 
+```
 ./
 ├── _config.yml
 │
@@ -80,6 +64,8 @@ See: [github/pages-gem](https://github.com/github/pages-gem)
 │
 └── _site/
     └── ...
+```
+{: .-box-chars}
 
 ## Front-matter
 {: .-three-column}
@@ -114,7 +100,6 @@ In `_config.yml`:
 {: .-setup}
 
 ```yaml
-# Optional
 source: .
 destination: _site
 exclude:
@@ -123,6 +108,7 @@ exclude:
 include: ['.htaccess']
 ```
 
+All config keys are optional.
 See: [Configuration](http://jekyllrb.com/docs/configuration/)
 
 Markup