Code Inspection: Single character alternation
Reports single char alternation in a RegExp. It is simpler to use a character class instead. This may also provide better matching performance.
After the quick-fix is applied:
New in 2017.1
Suppress an inspection in the editor
Position the caret at the highlighted line and press Alt+Enter or click .
Click the arrow next to the inspection you want to suppress and select the necessary suppress action.