Correct Serial return types

Language/Functions/Communication/Serial/print.adoc

@@ -52,7 +52,7 @@ To send a single byte, use link:../write[Serial.write()].
 
 [float]
 === Returns
-`size_t (long)`: `print()` returns the number of bytes written, though reading that number is optional.
+`size_t`: `print()` returns the number of bytes written, though reading that number is optional.
 
 --
 // OVERVIEW SECTION ENDS

Language/Functions/Communication/Serial/println.adoc

@@ -33,7 +33,7 @@ Prints data to the serial port as human-readable ASCII text followed by a carria
 
 [float]
 === Returns
-`size_t` (`long`): `println()` returns the number of bytes written, though reading that number is optional
+`size_t`: `println()` returns the number of bytes written, though reading that number is optional
 --
 // OVERVIEW SECTION ENDS
 

Language/Functions/Communication/Serial/readBytesUntil.adoc

@@ -38,7 +38,7 @@ Serial.readBytesUntil() reads characters from the serial buffer into an array. T
 
 [float]
 === Returns
-`byte`
+`size_t`
 
 --
 // OVERVIEW SECTION ENDS

Language/Functions/Communication/Serial/readString.adoc

@@ -33,7 +33,7 @@ Nothing
 
 [float]
 === Returns
-A string read from the serial buffer
+A String read from the serial buffer
 
 --
 // OVERVIEW SECTION ENDS

Language/Functions/Communication/Serial/readStringUntil.adoc

@@ -33,7 +33,7 @@ This function is part of the Stream class, and is called by any class that inher
 
 [float]
 === Returns
-The entire string read from the serial buffer, until the terminator character is detected
+The entire String read from the serial buffer, until the terminator character is detected
 
 --
 // OVERVIEW SECTION ENDS

Language/Functions/Communication/Serial/write.adoc

@@ -40,7 +40,7 @@ _Arduino Mega also supports:_
 
 [float]
 === Returns
-`byte`
+`size_t`
 
 `write()` will return the number of bytes written, though reading that number is optional