doc: fix typo in crypto Hash.digest() note

Added the word 'has' to the sentence.
Closes #4652.

diff --git a/doc/api/crypto.markdown b/doc/api/crypto.markdown
index 00ed394..e6cff32 100644 (file)
--- a/doc/api/crypto.markdown
+++ b/doc/api/crypto.markdown
@@ -75,7 +75,7 @@ Calculates the digest of all of the passed data to be hashed.
 The `encoding` can be `'hex'`, `'binary'` or `'base64'`.
 Defaults to `'binary'`.
 
-Note: `hash` object can not be used after `digest()` method been called.
+Note: `hash` object can not be used after `digest()` method has been called.
 
 
 ## crypto.createHmac(algorithm, key)