Makefile.in: Update whitespacecheck target to show spaces before tabs

diff --git a/Makefile.in b/Makefile.in
index 05fdd25569133dafa4f06a9884041033c46c6a07..d18f9f7bb02f852257b5b997655a93194d99a24b 100644 (file)
--- a/Makefile.in
+++ b/Makefile.in
@@ -567,6 +567,11 @@ whitespacecheck:
            echo 'Error: Trailing tabs(s).'; \
            exit 1; \
        fi
+       @# space(s) before tab(s)?
+       @if git grep -I -n '[ ][        ]' $$(git ls-files|grep -v '^tests/'); then \
+           echo 'Error: space(s) before tab(s).'; \
+           exit 1; \
+       fi
 
 testlist:
        echo $(TEST_DIST)