Merge pull request arduino#38 from dbrgn/fix-docs-serial-read

Fix docs on Serial.readBytes return value

Author: agdl

Language/Functions/Communication/Serial/readBytes.adoc

@@ -36,7 +36,7 @@ title: Serial.readBytes()
 
 [float]
 === Returns
-`byte`
+The number of bytes placed in the buffer (`size_t`)
 
 --
 // OVERVIEW SECTION ENDS

Language/Functions/Communication/Stream/streamReadBytes.adoc

@@ -38,7 +38,7 @@ This function is part of the Stream class, and is called by any class that inher
 
 [float]
 === Returns
-The number of bytes placed in the buffer.
+The number of bytes placed in the buffer (`size_t`)
 
 --
 // OVERVIEW SECTION ENDS