[ng] cosmetics: add a short explicative comment

* lib/am/texibuild.mk (am.texi.build.html): Here.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

diff --git a/lib/am/texibuild.mk b/lib/am/texibuild.mk
index 1669e309bdb2fb48084d61cb24e210b4c47bba06..48f2ea12cbaf60d6c2298831f51ab1907905714f 100644 (file)
--- a/lib/am/texibuild.mk
+++ b/lib/am/texibuild.mk
@@ -93,6 +93,7 @@ define am.texi.build.html
          rm -rf $@; \
          mv $(@:.html=.htp) $@; \
        else \
+## on failure, remove the temporary directory before exiting.
          rm -rf $(@:.html=.htp) $@; \
          exit 1; \
        fi