".S" is not a valid extension when trying to add a .S tab #5389
Description
Using Arduino IDE 1.6.12 Hourly Build 2016/09/14 08:20 with Windows 7 64 bit
- Click the tab menu button(downward pointing triangle) > New Tab
- Name for new file: foo.S
- Click the "OK" button
- "Problem with rename" dialog pops up with the message
".S" is not a valid extension.
This doesn't occur with Arduino IDE 1.6.11 or previous.
This doesn't occur with .s extension.