Arduino/build/shared/examples/08.Strings/StringLength/StringLength.ino

has a typo on line 29.

Serial.ptintln();

should be

Serial.println();

I'm not seeing that in .../examples/8.Strings/StringLength.

http://arduino.cc/en/Tutorial/StringLengthTrim also looks correct.

You have left out the new issue template items like:

What version of the Arduino software are you using? On what operating system?

It's in the github account: https://github.com/arduino/Arduino/blob/master/build/shared/examples/08.Strings/StringLength/StringLength.ino#L26

Also in the source code download: http://arduino.cc/en/Main/Software

in windows, mac, and linux downloads too. All versions newer than April 6, 2012.

Here is the exact commit where the typo showed up: https://github.com/arduino/Arduino/commit/412f261e41e2ff26a63876a3dd56a02917c575ef

The error is right on the page at: http://arduino.cc/en/Tutorial/StringLengthTrim

" Serial.println("\n\nString length():"); Serial.ptintln(); }"

is incorrect

Please accept my apology. The web page is indeed incorrect. The version I have on Mac OSX in Arduino.app/Contents/Resources/Java/examples/8.Strings/StringLength/ from Apr 8 18:02 is quite different from the web page! Arrgh!