- Docs: Put checks into itemized list

Author: brettz9

.README/rules/require-file-overview.md

@@ -1,12 +1,14 @@
 ### `require-file-overview`
 
-Requires that all files have a `@file`, `@fileoverview`, or `@overview` tag.
+Checks that:
 
-Duplicate file overview tags will be reported as will file overview tags
-which are not, as per [the docs](https://jsdoc.app/tags-file.html),
-"at the beginning of the file", where beginning of the file is interpreted
-in this rule as being when the overview tag is not preceded by
-anything other than a comment.
+1. All files have a `@file`, `@fileoverview`, or `@overview` tag.
+2. Duplicate file overview tags within a given file will be reported
+3. File overview tags will be reported which are not, as per
+  [the docs](https://jsdoc.app/tags-file.html), "at the beginning of
+  the file"–where beginning of the file is interpreted in this rule
+  as being when the overview tag is not preceded by anything other than
+  a comment.
 
 #### Fixer
 

README.md

@@ -6197,13 +6197,15 @@ function quux () {
 <a name="eslint-plugin-jsdoc-rules-require-file-overview"></a>
 ### <code>require-file-overview</code>
 
-Requires that all files have a `@file`, `@fileoverview`, or `@overview` tag.
-
-Duplicate file overview tags will be reported as will file overview tags
-which are not, as per [the docs](https://jsdoc.app/tags-file.html),
-"at the beginning of the file", where beginning of the file is interpreted
-in this rule as being when the overview tag is not preceded by
-anything other than a comment.
+Checks that:
+
+1. All files have a `@file`, `@fileoverview`, or `@overview` tag.
+2. Duplicate file overview tags within a given file will be reported
+3. File overview tags will be reported which are not, as per
+  [the docs](https://jsdoc.app/tags-file.html), "at the beginning of
+  the file"–where beginning of the file is interpreted in this rule
+  as being when the overview tag is not preceded by anything other than
+  a comment.
 
 <a name="eslint-plugin-jsdoc-rules-require-file-overview-fixer-1"></a>
 #### Fixer