Correct typos in comments and documentation

Author: per1234

README.md

@@ -25,7 +25,7 @@ float pi = 3.1459;
 Debug.print(DBG_VERBOSE, "i = %d, pi = %f", i, pi);
 ```
 
-If desired timestamps can be prefixed to the debug message. Timestamp output can be enabled and disabled via `timestampOn` and `timestampOff`.
+If desired, timestamps can be prefixed to the debug message. Timestamp output can be enabled and disabled via `timestampOn` and `timestampOff`.
 
 # How-To-Use Advanced
 Normally all debug output is redirected to the primary serial output of each board (`Serial`). In case you want to redirect the output to another output stream you can make use of `setDebugOutputStream(&Serial2)`.

examples/Arduino_Debug_Advance/Arduino_Debug_Advance.ino

@@ -1,11 +1,12 @@
 /*
    Advanced Debug can be helpful in embedded applications when
-   there are more that two microcontrollers connected serially
+   there are more than two microcontrollers connected serially
    or a wireless sensor like XBee is connected to the serial port
-   that will send data wirelessly to other XBee node.
+   that will send data wirelessly to other XBee nodes.
 
-   In boards like Arduino Nano, UNO, MEGA only one serial port is available,
-   therefore additional Software Serial ports can be made using SoftwareSerial
+   In boards like Arduino Nano, UNO, or MEGA only one serial port is available,
+   therefore additional software serial ports can be made using the
+   SoftwareSerial library.
 */
 
 #include "Arduino_DebugUtils.h"

src/Arduino_DebugUtils.cpp

@@ -120,4 +120,4 @@ bool Arduino_DebugUtils::shouldPrint(int const debug_level) const
 Arduino_DebugUtils Debug;
 void setDebugMessageLevel(int const debug_level) {
   Debug.setDebugLevel(debug_level);
-}
+}

src/Arduino_DebugUtils.h

@@ -78,4 +78,4 @@ class Arduino_DebugUtils {
 
 extern Arduino_DebugUtils Debug;
 
-#endif /* ARDUINO_DEBUG_UTILS_H_ */
+#endif /* ARDUINO_DEBUG_UTILS_H_ */