Enable lint rule

Author: kgryte

lib/node_modules/@stdlib/buffer/from-string/README.md

@@ -65,6 +65,8 @@ The following `encodings` are supported:
 
 <!-- eslint-disable no-buffer-constructor -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var randu = require( '@stdlib/random/base/randu' );
 var randint = require( '@stdlib/random/base/discrete-uniform' );

lib/node_modules/@stdlib/complex/README.md

@@ -29,6 +29,8 @@ var o = ns;
 
 <!-- TODO: better examples -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var getKeys = require( 'object-keys' ).shim();
 var ns = require( '@stdlib/complex' );

lib/node_modules/@stdlib/crypto/README.md

@@ -29,6 +29,8 @@ var c = cryptography;
 
 <!-- TODO: better examples -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var getKeys = require( 'object-keys' ).shim();
 var ns = require( '@stdlib/crypto' );

lib/node_modules/@stdlib/datasets/README.md

@@ -78,6 +78,8 @@ var data = datasets( 'MINARD_NAPOLEONS_MARCH', opts );
 
 <!-- TODO: better examples -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var datasets = require( '@stdlib/datasets' );
 

lib/node_modules/@stdlib/datasets/anscombes-quartet/README.md

@@ -92,6 +92,8 @@ var d = data();
 
 <!-- TODO: more interesting example involving stats and plotting once ndarray -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var data = require( '@stdlib/datasets/anscombes-quartet' );
 

lib/node_modules/@stdlib/datasets/moby-dick/README.md

@@ -41,6 +41,8 @@ Each `array` element has the following fields:
 
 <!-- TODO: better example. Possibly with Markov Model text generation. -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var text = require( '@stdlib/datasets/moby-dick' );
 

lib/node_modules/@stdlib/datasets/spam-assassin/README.md

@@ -55,6 +55,8 @@ The `checksum` object contains the following fields:
 
 <!-- TODO: better example. Possibly a spam classifier. -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var corpus = require( '@stdlib/datasets/spam-assassin' );
 

lib/node_modules/@stdlib/error/README.md

@@ -29,6 +29,8 @@ var o = ns;
 
 <!-- TODO: better examples -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var getKeys = require( 'object-keys' ).shim();
 var ns = require( '@stdlib/error' );

lib/node_modules/@stdlib/fastmath/README.md

@@ -44,6 +44,8 @@ var ns = fastmath;
 
 <!-- TODO: better examples -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var getKeys = require( 'object-keys' ).shim();
 var fastmath = require( '@stdlib/fastmath' );

lib/node_modules/@stdlib/fastmath/special/README.md

@@ -29,6 +29,8 @@ var fcns = fmath;
 
 <!-- TODO: better examples -->
 
+<!-- eslint no-undef: "error" -->
+
 ```javascript
 var getKeys = require( 'object-keys' ).shim();
 var fmath = require( '@stdlib/fastmath/special' );