To run a single inspection in previous versions of IntelliJ IDEA you had to create a dedicated inspection profile for that or use “Run inspection on…” from inspection’s quick fix list. In IntelliJ IDEA X you can find and run inspection by its name on any scope without creating an inspection profile. Use Run Inspection by Name (Ctrl+Alt+Shift+I) action anywhere to choose a desired inspection from hundreds of available,
then select a scope to run inspection on,
and get results.
This action is available since version 98.402 in Main Menu-> Analyze->Run Inspection by Name.