doc lint: fix error-hiding regression

Fix the broken "make lint-docs" (or "make check-docs" at the
top-level) target, which has been broken since my cafd982 (doc
lint: lint and fix missing "GIT" end sections, 2021-04-09).

The CI for "seen" is emitting an error about a broken gitlink, but due
to there being 3x scripts chained via ";" instead of "&&" we're not
carrying forward the non-zero exit code.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

Documentation/Makefile

@@ -483,9 +483,9 @@ lint-docs::
 		$(HOWTO_TXT) $(DOC_DEP_TXT) \
 		--section=1 $(MAN1_TXT) \
 		--section=5 $(MAN5_TXT) \
-		--section=7 $(MAN7_TXT); \
-	$(PERL_PATH) lint-man-end-blurb.perl $(MAN_TXT); \
-	$(PERL_PATH) lint-man-section-order.perl $(MAN_TXT);
+		--section=7 $(MAN7_TXT) && \
+	$(PERL_PATH) lint-man-end-blurb.perl $(MAN_TXT) && \
+	$(PERL_PATH) lint-man-section-order.perl $(MAN_TXT)
 
 ifeq ($(wildcard po/Makefile),po/Makefile)
 doc-l10n install-l10n::