1b06ed136f
1340eda3b7 Fix typos (practicalswift)
Pull request description:
Fix typos.
Tree-SHA512: 533a136831387ef26e9a74ba078437496bee38cc026da73fa9e6f6e7f4d5665eccac24cf3ef05e6d3af1329a1214f5ce71b039ddb8378b074e6d4408b8701f95