Fix encoding issues when using Copy button

Previously the Copy button was using the GitHub API to fetch the file
contents in base64 form, and then decoding that. This caused unicode
symbols to be incorrectly encoded (such as the copyright symbol in
several files). This commit changes the Copy button to instead fetch the
file directly, which fixes the encoding issue.

Author: Menardi

src/components/common/CopyFileButton.js

@@ -1,7 +1,7 @@
 import React, { useState } from 'react'
 import styled from '@emotion/styled'
 import { Button, Popover } from 'antd'
-import { getFileApiURL, replaceWithProvidedAppName } from '../../utils'
+import { getBinaryFileURL, replaceWithProvidedAppName } from '../../utils'
 import { CopyOutlined } from '@ant-design/icons'
 
 const popoverContentOpts = {
@@ -16,9 +16,8 @@ const CopyFileButton = styled(
     )
 
     const fetchContent = () =>
-      fetch(getFileApiURL({ packageName, version, path }))
-        .then((response) => response.json())
-        .then((json) => window.atob(json.content))
+      fetch(getBinaryFileURL({ packageName, version, path }))
+        .then((response) => response.text())
         .then((content) => replaceWithProvidedAppName(content, appName))
 
     const copyContent = () => {

src/utils.js

@@ -44,17 +44,9 @@ const getBranch = ({ packageName, language, version }) =>
 export const getBinaryFileURL = ({ packageName, language, version, path }) => {
   const branch = getBranch({ packageName, language, version })
 
-  return `https://github.com/${getRNDiffRepository({
-    packageName,
-  })}/raw/release/${branch}/${path}`
-}
-
-export const getFileApiURL = ({ packageName, language, version, path }) => {
-  const branch = getBranch({ packageName, language, version })
-
-  return `https://api.github.com/repos/${getRNDiffRepository({
+  return `https://raw.githubusercontent.com/${getRNDiffRepository({
     packageName,
-  })}/contents/${path}?ref=${encodeURIComponent(`release/${branch}`)}`
+  })}/release/${branch}/${path}`
 }
 
 export const removeAppPathPrefix = (path, appName) =>