docs: A few of minor copy changes (nodejs#267)

0xnoob · amiller-gh · commit 6ff817a0caaf · 2019-06-20T08:54:42.000-07:00
diff --git a/src/documentation/0013-node-output-to-cli/index.md b/src/documentation/0013-node-output-to-cli/index.md
@@ -34,14 +34,14 @@ console.log('My %s has %d years', 'cat', 2)
 ```
 
 - `%s` format a variable as a string
-- `%d` or `%i` format a variable as an integer
-- `%f` format a variable as a floating point number
-- `%O` used to print an object representation
+- `%d` format a variable as a number
+- `%i` format a variable as its integer part only
+- `%o` format a variable as an object
 
 Example:
 
 ```js
-console.log('%O', Number)
+console.log('%o', Number)
 ```
 
 ## Clear the console
diff --git a/src/documentation/0014-node-input-from-cli/index.md b/src/documentation/0014-node-input-from-cli/index.md
@@ -29,7 +29,7 @@ In this callback function, we close the readline interface.
 
 `readline` offers several other methods, and I'll let you check them out on the package documentation linked above.
 
-If you need to require a password, it's best to now echo it back, but instead showing a `*` symbol.
+If you need to require a password, it's best not to echo it back, but instead showing a `*` symbol.
 
 The simplest way is to use the [`readline-sync` package](https://www.npmjs.com/package/readline-sync) which is very similar in terms of the API and handles this out of the box.
 
diff --git a/src/documentation/0016-npm/index.md b/src/documentation/0016-npm/index.md
@@ -15,7 +15,7 @@ It started as a way to download and manage dependencies of Node.js packages, but
 
 There are many things that `npm` does.
 
-> Yarn is an alternative to npm. Make sure you check it out as well.
+> [**Yarn**](https://yarnpkg.com/en/) is an alternative to npm. Make sure you check it out as well.
 
 ## Downloads
 
diff --git a/src/documentation/0019-package-json/index.md b/src/documentation/0019-package-json/index.md
@@ -445,7 +445,7 @@ Each has a specific property, like `eslintConfig`, `babel` and others. Those are
 
 You have seen in the description above version numbers like these: `~3.0.0` or `^0.13.0`. What do they mean, and which other version specifiers can you use?
 
-That symbol specifies which updates you package accepts, from that dependency.
+That symbol specifies which updates your package accepts, from that dependency.
 
 Given that using semver (semantic versioning) all versions have 3 digits, the first being the major release, the second the minor release and the third is the patch release, you have these rules:
 
