Enable lint rule

Author: kgryte

lib/node_modules/@stdlib/regexp/basename-posix/README.md

@@ -27,6 +27,8 @@ var base = RE_BASENAME_POSIX.exec( 'foo/bar/index.js' )[ 1 ];
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_BASENAME_POSIX = require( '@stdlib/regexp/basename-posix' );
 

lib/node_modules/@stdlib/regexp/basename-windows/README.md

@@ -27,6 +27,8 @@ var base = RE_BASENAME_WINDOWS.exec( 'foo\\bar\\index.js' )[ 1 ];
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_BASENAME_WINDOWS = require( '@stdlib/regexp/basename-windows' );
 

lib/node_modules/@stdlib/regexp/basename/README.md

@@ -50,6 +50,8 @@ var base = RE_BASENAME.win32.exec( 'C:\\foo\\bar\\index.js' )[ 1 ];
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_BASENAME = require( '@stdlib/regexp/basename' );
 

lib/node_modules/@stdlib/regexp/color-hexadecimal/README.md

@@ -54,6 +54,8 @@ bool = RE_COLOR_HEXADECIMAL.test( '000' );
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
 var RE_COLOR_HEXADECIMAL = require( '@stdlib/regexp/color-hexadecimal' );

lib/node_modules/@stdlib/regexp/decimal-number/README.md

@@ -63,6 +63,8 @@ out = RE_DECIMAL_NUMBER.exec( '' );
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_DECIMAL_NUMBER = require( '@stdlib/regexp/decimal-number' );
 

lib/node_modules/@stdlib/regexp/dirname-posix/README.md

@@ -27,6 +27,8 @@ var dir = RE_DIRNAME_POSIX.exec( 'foo/bar/index.js' )[ 1 ];
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_DIRNAME_POSIX = require( '@stdlib/regexp/dirname-posix' );
 

lib/node_modules/@stdlib/regexp/dirname-windows/README.md

@@ -27,6 +27,8 @@ var dir = RE_DIRNAME_WINDOWS.exec( 'foo\\bar\\index.js' )[ 1 ];
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_DIRNAME_WINDOWS = require( '@stdlib/regexp/dirname-windows' );
 

lib/node_modules/@stdlib/regexp/dirname/README.md

@@ -50,6 +50,8 @@ var dir = RE_DIRNAME.win32.exec( 'C:\\foo\\bar\\index.js' )[ 1 ];
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_DIRNAME = require( '@stdlib/regexp/dirname' );
 

lib/node_modules/@stdlib/regexp/eol/README.md

@@ -33,6 +33,8 @@ bool = RE_EOL.test( '\\r\\n' );
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_EOL = require( '@stdlib/regexp/eol' );
 

lib/node_modules/@stdlib/regexp/extended-length-path/README.md

@@ -27,6 +27,8 @@ var bool = RE_EXTENDED_LENGTH_PATH.test( '\\\\?\\C:\\foo\\bar' );
 
 ## Examples
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var RE_EXTENDED_LENGTH_PATH = require( '@stdlib/regexp/extended-length-path' );