Fix typo (#4)

Author: pavsidhu

docs/index.html

@@ -74,7 +74,7 @@ <h1>Installation</h1>
 		</section>
 		<section>
 			<h1>Concept</h1>
-			<p>EyeJS have two test modes: the <b>node</b> mode, which run tests in a simple node environement, as Jest or Mocha would do. <br>And, our unique feature, which is the <b>browser</b> mode. It will tell your browser to do the tests.</p>
+			<p>EyeJS have two test modes: the <b>node</b> mode, which run tests in a simple node environment, as Jest or Mocha would do. <br>And, our unique feature, which is the <b>browser</b> mode. It will tell your browser to do the tests.</p>
 		</section>
 		<section>
 			<h1>Syntax</h1>