I don’t know how they got in there, but it took a great deal of debugging and extra coding (1/2 day) to figure out that there were some invisible characters embedded in my .ino file that were causing my application not to run as expected.
I’m quite new to the Arduino IDE environment so if this is a known issue please excuse me for reporting it.
If not, worth a fix to weed them out, or display them as special characters, for sure.
Please see the screenshot of the .ino file in the IDE and hex editor showing the same file.
What you see is not what you get