$ ./tools/format-cpp
----
+Pass a directory path to only format the {cpp} files it contains:
+
+----
+$ ./tools/format-cpp ./src/cli
+----
+
Use the `FORMATTER` environment variable to override the default
formatter (`clang-format{nbsp}-i`):
----
-$ FORMATTER='clang-format-10 -i' ./tools/format-cpp
+$ FORMATTER='my-clang-format-15 -i' ./tools/format-cpp
----
==== Naming