diff --git a/_sass/2017/components/h3-section.scss b/_sass/2017/components/h3-section.scss
index fe486e49f..a70ae29fb 100644
--- a/_sass/2017/components/h3-section.scss
+++ b/_sass/2017/components/h3-section.scss
@@ -132,10 +132,17 @@
     }
   }
 
-  /* Line divisions */
+  // Line divisions
   & > *:not(:first-child) {
     border-top: solid 1px $line-color;
   }
+
+  // Collapse paragraphs together
+  & > p + p,
+  & > p + p:not(:first-child) {
+    margin-top: -1.5em;
+    border-top: 0;
+  }
 }
 
 /*
diff --git a/go.md b/go.md
index ec216a68a..0baa81d9e 100644
--- a/go.md
+++ b/go.md
@@ -233,6 +233,58 @@ By defining the return value names in the signature, a `return` (no args) will r
 
 See: [Named return values](https://tour.golang.org/basics/7)
 
+## Packages
+{: .-three-column}
+
+### Importing
+
+```go
+import "fmt"
+import "math/rand"
+```
+
+```go
+import (
+  "fmt"        // gives fmt.Println
+  "math/rand"  // gives rand.Intn
+)
+```
+
+Both are the same.
+
+See: [Importing](https://tour.golang.org/basics/1)
+
+### Aliases
+
+```go
+import r "math/rand"
+```
+{: data-line="1"}
+
+```go
+r.Intn()
+```
+
+### Exporting names
+
+```go
+func Hello () {
+  ···
+}
+```
+
+Exported names begin with capital letters.
+
+See: [Exported names](https://tour.golang.org/basics/3)
+
+### Packages
+
+```go
+package hello
+```
+
+Every package file has to start with `package`.
+
 ## Concurrency
 {: .-three-column}
 
@@ -301,6 +353,7 @@ for i := range ch {
   ···
 }
 ```
+{: data-line="2"}
 
 ```go
 // Closed if ok == false
diff --git a/react.md b/react.md
index 29aeb6de7..2b50bab33 100644
--- a/react.md
+++ b/react.md
@@ -64,6 +64,7 @@ render () {
 {: data-line="2"}
 
 Use `this.props` to access properties passed to the component.
+
 See: [Properties](https://facebook.github.io/react/docs/tutorial.html#using-props)
 
 ### States
@@ -81,6 +82,7 @@ render () {
 {: data-line="2"}
 
 Use states (`this.state`) to manage dynamic data.
+
 See: [States](https://facebook.github.io/react/docs/tutorial.html#reactive-state)
 
 ### Nesting
@@ -99,8 +101,9 @@ class Info extends React.Component {
 ```
 {: data-line="6,7"}
 
-Nest components to separate concerns. See: [Composing Components](https://facebook.github.io/react/docs/components-and-props.html#composing-components)
+Nest components to separate concerns.
 
+See: [Composing Components](https://facebook.github.io/react/docs/components-and-props.html#composing-components)
 
 ### Children
 
@@ -168,6 +171,7 @@ function MyComponent ({ name }) {
 {: data-line="1"}
 
 Functional components have no state. Also, their `props` are passed as the first parameter to a function.
+
 See: [Function and Class Components](https://facebook.github.io/react/docs/components-and-props.html#functional-and-class-components)
 
 ### Pure components
@@ -180,6 +184,7 @@ class MessageBox extends React.PureComponent {
 {: data-line="1"}
 
 Performance-optimized version of `React.Component`. Doesn't rerender if props/state hasn't changed.
+
 See: [Pure components](https://facebook.github.io/react/docs/react-api.html#react.purecomponent)
 
 ### Component API
@@ -197,7 +202,9 @@ this.state
 this.props
 ```
 
-These methods and properies are available for `Component` instances. See: [Component API](http://facebook.github.io/react/docs/component-api.html)
+These methods and properies are available for `Component` instances.
+
+See: [Component API](http://facebook.github.io/react/docs/component-api.html)
 
 Lifecycle
 ---------
@@ -227,7 +234,9 @@ Add DOM event handlers, timers (etc) on `componentDidMount()`, then remove them
 | `render()` | Render |
 | `componentDidUpdate` *(prevProps, prevState)* | Operate on the DOM here |
 
-Called when parents change properties and `.setState()`. These are not called for initial renders. See: [Reference](http://facebook.github.io/react/docs/component-specs.html#updating-componentwillreceiveprops).
+Called when parents change properties and `.setState()`. These are not called for initial renders.
+
+See: [Component specs](http://facebook.github.io/react/docs/component-specs.html#updating-componentwillreceiveprops)
 
 DOM nodes
 ---------
@@ -250,7 +259,9 @@ class MyComponent extends React.Component {
 ```
 {: data-line="4,9"}
 
-Allows access to DOM nodes. See: [Refs and the DOM](https://facebook.github.io/react/docs/refs-and-the-dom.html)
+Allows access to DOM nodes.
+
+See: [Refs and the DOM](https://facebook.github.io/react/docs/refs-and-the-dom.html)
 
 ### DOM Events
 
@@ -269,7 +280,9 @@ class MyComponent extends React.Component {
 ```
 {: data-line="5,9"}
 
-Pass functions to attributes like `onChange`. See: [Events](https://facebook.github.io/react/docs/events.html)
+Pass functions to attributes like `onChange`.
+
+See: [Events](https://facebook.github.io/react/docs/events.html)
 
 ## Other features
 
@@ -290,7 +303,8 @@ class VideoPlayer extends React.Component {
 {: data-line="3"}
 
 Propagates `src="..."` down to the sub-component.
-See [Transferring props](http://facebook.github.io/react/docs/transferring-props.html).
+
+See [Transferring props](http://facebook.github.io/react/docs/transferring-props.html)
 
 ### Top-level API
 
@@ -310,6 +324,7 @@ ReactDOMServer.renderToStaticMarkup(<Component />)
 ```
 
 There are more, but these are most common.
+
 See: [React top-level API](https://facebook.github.io/react/docs/react-api.html)
 
 JSX patterns