Add option to preserve whitespace

src/Terminal.jsx

@@ -119,6 +119,7 @@ export default class Terminal extends Component {
         dangerMode={this.props.dangerMode}
         className={!line.isEcho ? this.props.messageClassName : /* istanbul ignore next: Covered by interactivity tests */ undefined}
         style={!line.isEcho ? this.props.messageStyle : /* istanbul ignore next: Covered by interactivity tests */ undefined}
+        preserveSpacing={this.props.preserveSpacing}
       />
     })
   }

src/TerminalMessage.jsx

@@ -5,16 +5,20 @@ import defaults from 'defaults'
 import types from './defs/types/TerminalMessage'
 import sourceStyles from './defs/styles/TerminalMessage'
 
+import preserveSpaces from './utils/preserveSpaces'
+
 export default class TerminalMessage extends Component {
   static propTypes = types
 
   render () {
-    const { content, style, className } = this.props
+    const { content, style, className, preserveSpacing } = this.props
 
     const styles = {
       message: defaults(style, sourceStyles)
     }
 
+    content = preserveSpacing ? preserveSpaces(content) : content
+
     return this.props.dangerMode && typeof content === 'string'
       ? <div className={className} style={styles.message} {...html(content)}/>
       : <div className={className} style={styles.message}>{content}</div>

src/defs/types/Terminal.js

@@ -39,7 +39,8 @@ const optionTypes = {
   noEchoBack: PropTypes.bool,
   noHistory: PropTypes.bool,
   noAutoScroll: PropTypes.bool,
-  noNewlineParsing: PropTypes.bool
+  noNewlineParsing: PropTypes.bool,
+  preserveSpacing: PropTypes.bool
 }
 
 const labelTypes = {

src/defs/types/TerminalMessage.js

@@ -4,5 +4,6 @@ export default {
   content: PropTypes.node,
   style: PropTypes.object,
   className: PropTypes.string,
-  dangerMode: PropTypes.bool
+  dangerMode: PropTypes.bool,
+  preserveSpacing: PropTypes.bool
 }

src/utils/preserveSpaces.js

@@ -0,0 +1,7 @@
+/**
+ * Returns a string where spacing is honored by html.
+ * @param {string} stringOutput
+ */
+export default function renderSpaces(stringOutput) {
+  return stringOutput.replace(/ /g, '\u00A0');
+}