added expected output for selfcheck

Author: firewave

.github/workflows/CI-unixish.yml

@@ -45,7 +45,7 @@ jobs:
     - name: Install missing software on macos
       if: contains(matrix.os, 'macos')
       run: |
-        brew install coreutils
+        brew install coreutils diffutils
 
     - name: Install missing Python packages
       run: |

Makefile

@@ -22,7 +22,7 @@ test:	testrunner	simplecpp
 	python3 -m pytest integration_test.py -vv
 
 selfcheck:	simplecpp
-	./selfcheck.sh
+	STRICT=1 ./selfcheck.sh
 
 simplecpp:	main.o simplecpp.o
 	$(CXX) $(LDFLAGS) main.o simplecpp.o -o simplecpp