diff --git a/include/mbedtls/md2.h b/include/mbedtls/md2.h
index 1d81c28..2a14b10 100644
--- a/include/mbedtls/md2.h
+++ b/include/mbedtls/md2.h
@@ -92,7 +92,7 @@
  * \brief          MD2 process buffer
  *
  * \param ctx      MD2 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  *
  * \return         0 if successful
@@ -146,7 +146,7 @@
  * \deprecated     Superseded by mbedtls_md2_update_ext() in 2.5.0
  *
  * \param ctx      MD2 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  */
 MBEDTLS_DEPRECATED static inline void mbedtls_md2_update(
@@ -203,7 +203,7 @@
 /**
  * \brief          Output = MD2( input buffer )
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   MD2 checksum result
  */
@@ -222,7 +222,7 @@
  *
  * \deprecated     Superseded by mbedtls_md2() in 2.5.0
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   MD2 checksum result
  */
diff --git a/include/mbedtls/md4.h b/include/mbedtls/md4.h
index 671c6a4..f5d335d 100644
--- a/include/mbedtls/md4.h
+++ b/include/mbedtls/md4.h
@@ -92,7 +92,7 @@
  * \brief          MD4 process buffer
  *
  * \param ctx      MD4 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  *
  * \return         0 if successful
@@ -148,7 +148,7 @@
  * \deprecated     Superseded by mbedtls_md4_update_ext() in 2.5.0
  *
  * \param ctx      MD4 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  */
 MBEDTLS_DEPRECATED static inline void mbedtls_md4_update(
@@ -207,7 +207,7 @@
 /**
  * \brief          Output = MD4( input buffer )
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   MD4 checksum result
  *
@@ -228,7 +228,7 @@
  *
  * \deprecated     Superseded by mbedtls_md4_ext() in 2.5.0
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   MD4 checksum result
  */
diff --git a/include/mbedtls/md5.h b/include/mbedtls/md5.h
index 816d081..5a7a00a 100644
--- a/include/mbedtls/md5.h
+++ b/include/mbedtls/md5.h
@@ -87,7 +87,7 @@
  * \brief          MD5 process buffer
  *
  * \param ctx      MD5 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  *
  * \return         0 if successful
@@ -143,7 +143,7 @@
  * \deprecated     Superseded by mbedtls_md5_update_ext() in 2.5.0
  *
  * \param ctx      MD5 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  */
 MBEDTLS_DEPRECATED static inline void mbedtls_md5_update(
@@ -202,7 +202,7 @@
 /**
  * \brief          Output = MD5( input buffer )
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   MD5 checksum result
  *
@@ -223,7 +223,7 @@
  *
  * \deprecated     Superseded by mbedtls_md5_ext() in 2.5.0
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   MD5 checksum result
  */
diff --git a/include/mbedtls/ripemd160.h b/include/mbedtls/ripemd160.h
index aea16b3..3186359 100644
--- a/include/mbedtls/ripemd160.h
+++ b/include/mbedtls/ripemd160.h
@@ -92,7 +92,7 @@
  * \brief          RIPEMD-160 process buffer
  *
  * \param ctx      RIPEMD-160 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  *
  * \return         0 if successful
@@ -148,7 +148,7 @@
  * \deprecated     Superseded by mbedtls_ripemd160_update_ext() in 2.5.0
  *
  * \param ctx      RIPEMD-160 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  */
 MBEDTLS_DEPRECATED static inline void mbedtls_ripemd160_update(
@@ -207,7 +207,7 @@
 /**
  * \brief          Output = RIPEMD-160( input buffer )
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   RIPEMD-160 checksum result
  *
@@ -228,7 +228,7 @@
  *
  * \deprecated     Superseded by mbedtls_ripemd160_ext() in 2.5.0
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   RIPEMD-160 checksum result
  */
diff --git a/include/mbedtls/sha1.h b/include/mbedtls/sha1.h
index 47a9f99..e18e6ac 100644
--- a/include/mbedtls/sha1.h
+++ b/include/mbedtls/sha1.h
@@ -92,7 +92,7 @@
  * \brief          SHA-1 process buffer
  *
  * \param ctx      SHA-1 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  *
  * \return         0 if successful
@@ -148,7 +148,7 @@
  * \deprecated     Superseded by mbedtls_sha1_update_ext() in 2.5.0
  *
  * \param ctx      SHA-1 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  */
 MBEDTLS_DEPRECATED static inline void mbedtls_sha1_update(
@@ -207,7 +207,7 @@
 /**
  * \brief          Output = SHA-1( input buffer )
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   SHA-1 checksum result
  *
@@ -228,7 +228,7 @@
  *
  * \deprecated     Superseded by mbedtls_sha1_ext() in 2.5.0
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   SHA-1 checksum result
  */
diff --git a/include/mbedtls/sha256.h b/include/mbedtls/sha256.h
index 76555f4..5fce7ee 100644
--- a/include/mbedtls/sha256.h
+++ b/include/mbedtls/sha256.h
@@ -94,7 +94,7 @@
  * \brief          SHA-256 process buffer
  *
  * \param ctx      SHA-256 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  *
  * \return         0 if successful
@@ -152,7 +152,7 @@
  * \deprecated     Superseded by mbedtls_sha256_update_ext() in 2.5.0
  *
  * \param ctx      SHA-256 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  */
 MBEDTLS_DEPRECATED static inline void mbedtls_sha256_update(
@@ -211,7 +211,7 @@
 /**
  * \brief          Output = SHA-256( input buffer )
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   SHA-224/256 checksum result
  * \param is224    0 = use SHA256, 1 = use SHA224
@@ -234,7 +234,7 @@
  *
  * \deprecated     Superseded by mbedtls_sha256_ext() in 2.5.0
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   SHA-224/256 checksum result
  * \param is224    0 = use SHA256, 1 = use SHA224
diff --git a/include/mbedtls/sha512.h b/include/mbedtls/sha512.h
index 0fbdb3b..7cba3f6 100644
--- a/include/mbedtls/sha512.h
+++ b/include/mbedtls/sha512.h
@@ -94,7 +94,7 @@
  * \brief          SHA-512 process buffer
  *
  * \param ctx      SHA-512 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  *
  * \return         0 if successful
@@ -152,7 +152,7 @@
  * \deprecated     Superseded by mbedtls_sha512_update_ext() in 2.5.0
  *
  * \param ctx      SHA-512 context
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  */
 MBEDTLS_DEPRECATED static inline void mbedtls_sha512_update(
@@ -211,7 +211,7 @@
 /**
  * \brief          Output = SHA-512( input buffer )
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   SHA-384/512 checksum result
  * \param is384    0 = use SHA512, 1 = use SHA384
@@ -234,7 +234,7 @@
  *
  * \deprecated     Superseded by mbedtls_sha512_ext() in 2.5.0
  *
- * \param input    buffer holding the  data
+ * \param input    buffer holding the data
  * \param ilen     length of the input data
  * \param output   SHA-384/512 checksum result
  * \param is384    0 = use SHA512, 1 = use SHA384