Add de-CH locale.

README.md

@@ -173,6 +173,7 @@ This method is useful when formatting multiple numbers in the same units for eas
 Returns a *locale* object for the specified *definition* with [*locale*.format](#locale_format) and [*locale*.formatPrefix](#locale_formatPrefix) methods. If *definition* is a string, it is the name of a built-in locale:
 
 * `"ca-ES"` - [Catalan (Spain)](https://github.com/d3/d3-format/tree/master/src/locale/ca-ES.js)
+* `"de-CH"` - [German (Switzerland)](https://github.com/d3/d3-format/tree/master/src/locale/de-CH.js)
 * `"de-DE"` - [German (Germany)](https://github.com/d3/d3-format/tree/master/src/locale/de-DE.js)
 * `"en-CA"` - [English (Canada)](https://github.com/d3/d3-format/tree/master/src/locale/en-CA.js)
 * `"en-GB"` - [English (United Kingdom)](https://github.com/d3/d3-format/tree/master/src/locale/en-GB.js)

index.js

@@ -5,6 +5,7 @@ import precisionPrefix from "./src/precisionPrefix";
 import precisionRound from "./src/precisionRound";
 
 import caEs from "./src/locale/ca-ES";
+import deCh from "./src/locale/de-CH";
 import deDe from "./src/locale/de-DE";
 import enCa from "./src/locale/en-CA";
 import enGb from "./src/locale/en-GB";
@@ -27,6 +28,7 @@ import zhCn from "./src/locale/zh-CN";
 
 var localeDefinitions = {
   "ca-ES": caEs,
+  "de-CH": deCh,
   "de-DE": deDe,
   "en-CA": enCa,
   "en-GB": enGb,

src/locale/de-CH.js

@@ -0,0 +1,6 @@
+export default {
+  decimal: ",",
+  thousands: "'",
+  grouping: [3],
+  currency: ["", "\xa0CHF"]
+};