githook: pre-commit run tests

Author: JPHutchins

.githooks/pre-commit

@@ -46,7 +46,16 @@ EOF
 fi
 
 # If there are whitespace errors, print the offending file names and fail.
-exec git diff-index --check --cached $against --
+git diff-index --check --cached $against
+if [ "$?" -ne 0 ]
+then
+    exit "$?"
+fi
 
 # Configure and run the tests/examples
-exec cmake -B build
+cmake -B build
+if [ "$?" -ne 0 ]
+then
+    exit "$?"
+fi
+