Fix various typos (#7355)

CHANGELOG-1.x.md

@@ -482,7 +482,7 @@ yarn add --exact react-scripts@1.0.16
 
   - [#3150](https://github.com/facebook/create-react-app/pull/3150) Remove an useless negation in `registerServiceWorker.js`. ([@dunglas](https://github.com/dunglas))
   - [#3158](https://github.com/facebook/create-react-app/pull/3158) Remove `output.path` from dev webpack config. ([@nikolas](https://github.com/nikolas))
-  - [#3281](https://github.com/facebook/create-react-app/pull/3281) Add a workaround for Uglify incompatiblity with Safari 10.0 in the future. ([@satyavh](https://github.com/satyavh))
+  - [#3281](https://github.com/facebook/create-react-app/pull/3281) Add a workaround for Uglify incompatibility with Safari 10.0 in the future. ([@satyavh](https://github.com/satyavh))
   - [#3146](https://github.com/facebook/create-react-app/pull/3146) Fix `reason-react` support. ([@lpalmes](https://github.com/lpalmes))
   - [#3236](https://github.com/facebook/create-react-app/pull/3236) Update `style-loader` and disable inclusion of its HMR code in builds. ([@insin](https://github.com/insin))
   - [#3246](https://github.com/facebook/create-react-app/pull/3246) Update `url-loader` to 0.6.2 for mime ReDoS vulnerability. ([@d3viant0ne](https://github.com/d3viant0ne))
@@ -1443,7 +1443,7 @@ yarn add --dev --exact react-scripts@1.0.1
 
 ## 1.0.0 (May 18, 2017)
 
-We’ve been working on this release for the past few months, and there are many big impovements, from migrating to webpack 2 to a brand new runtime error overlay and built-in support for Progressive Web Apps.
+We’ve been working on this release for the past few months, and there are many big improvements, from migrating to webpack 2 to a brand new runtime error overlay and built-in support for Progressive Web Apps.
 
 So instead of just enumerating them here, we decided to write a blog post about all the new features.<br>
 Check it out: **[What’s New in Create React App](https://facebook.github.io/react/blog/2017/05/18/whats-new-in-create-react-app.html)**.

azure-pipelines.yml

@@ -12,7 +12,7 @@ variables:
   NPM_CONFIG_CACHE: $(Build.SourcesDirectory)/../npm-cache
   # Sets TEMP to be on the same drive as the cloned source on Windows. This avoids test scripts that "cd" into a directory under TEMP from failing because this directory is on a different drive from the current directory.
   VSTS_OVERWRITE_TEMP: True
-  # Override Verdaccio package to use. This is temoporary and is needed to avoid socket timeouts on hosted Windows agent (on Azure). This also changes Verdaccio to return a 503 (service unavailable) instead of a 404 (not found) when the connection to the uplink timesout.
+  # Override Verdaccio package to use. This is temporary and is needed to avoid socket timeouts on hosted Windows agent (on Azure). This also changes Verdaccio to return a 503 (service unavailable) instead of a 404 (not found) when the connection to the uplink timesout.
   VERDACCIO_PACKAGE: https://github.com/willsmythe/verdaccio/releases/download/create-react-app/verdaccio-4.0.0-alpha.8.tgz
 
 # ******************************************************************************
@@ -67,7 +67,7 @@ jobs:
 # Old Node test suite
 # ******************************************************************************
 - job: OldNode
-  pool: 
+  pool:
     vmImage: ubuntu-16.04
   steps:
     - task: NodeTool@0

packages/react-error-overlay/src/utils/unmapper.js

@@ -12,7 +12,7 @@ import { getLinesAround } from './getLinesAround';
 import path from 'path';
 
 function count(search: string, string: string): number {
-  // Count starts at -1 becuse a do-while loop always runs at least once
+  // Count starts at -1 because a do-while loop always runs at least once
   let count = -1,
     index = -1;
   do {

packages/react-scripts/config/webpack.config.js

@@ -197,7 +197,7 @@ module.exports = function(webpackEnv) {
           terserOptions: {
             parse: {
               // we want terser to parse ecma 8 code. However, we don't want it
-              // to apply any minfication steps that turns valid ecma 5 code
+              // to apply any minification steps that turns valid ecma 5 code
               // into invalid ecma 5 code. This is why the 'compress' and 'output'
               // sections only apply transformations that are ecma 5 safe
               // https://github.com/facebook/create-react-app/pull/4234
@@ -213,7 +213,7 @@ module.exports = function(webpackEnv) {
               comparisons: false,
               // Disabled because of an issue with Terser breaking valid code:
               // https://github.com/facebook/create-react-app/issues/5250
-              // Pending futher investigation:
+              // Pending further investigation:
               // https://github.com/terser-js/terser/issues/120
               inline: 2,
             },

tasks/e2e-installs.sh

@@ -213,7 +213,7 @@ exists node_modules/react-scripts-fork
 # ******************************************************************************
 
 cd "$temp_app_path"
-# we will install a non-existing package to simulate a failed installataion.
+# we will install a non-existing package to simulate a failed installation.
 npx create-react-app test-app-should-not-exist --scripts-version=`date +%s` || true
 # confirm that the project files were deleted
 test ! -e test-app-should-not-exist/package.json
@@ -226,7 +226,7 @@ test ! -d test-app-should-not-exist/node_modules
 cd "$temp_app_path"
 mkdir test-app-should-remain
 echo '## Hello' > ./test-app-should-remain/README.md
-# we will install a non-existing package to simulate a failed installataion.
+# we will install a non-existing package to simulate a failed installation.
 npx create-react-app test-app-should-remain --scripts-version=`date +%s` || true
 # confirm the file exist
 test -e test-app-should-remain/README.md