- Updated Doxygen documentation generation and documentation on small parts

diff --git a/doxygen/input/doc_hashing.h b/doxygen/input/doc_hashing.h
index efaa738..95fb887 100644
--- a/doxygen/input/doc_hashing.h
+++ b/doxygen/input/doc_hashing.h
@@ -12,9 +12,9 @@
  * for authentication, which is a message integrity control. 
  * The following hashing-algorithms are provided:
  * - MD2, MD4, MD5 128-bit one-way hash functions by Ron Rivest (see 
- *   \c md2_hmac(),\c md4_hmac() and\c md5_hmac()).
+ *   \c md2_hmac(), \c md4_hmac() and \c md5_hmac()).
  * - SHA-1, SHA-256, SHA-384/512 160-bit or more one-way hash functions by 
- *   NIST and NSA (see\c sha1_hmac(),\c sha2_hmac() and\c sha4_hmac()).
+ *   NIST and NSA (see\c sha1_hmac(), \c sha2_hmac() and \c sha4_hmac()).
  *
  * This module provides one-way hashing which can be used for authentication.
  */