(lang-merge): Protect against grep's `(standard input)' output if there is

no input.

diff --git a/make/doclang-targets.make b/make/doclang-targets.make
index 1c8f501de19858827a39d04af975538a547ef9b9..7547e39ea69177fd4241b1bba42643134389b131 100644 (file)
--- a/make/doclang-targets.make
+++ b/make/doclang-targets.make
@@ -23,7 +23,7 @@ $(outdir)/lilypond.html: $(outdir)/lilypond.nexi
 local-WWW: png-ln $(outdir)/lilypond.html $(outdir)/lilypond/index.html deep-ln lang-merge
 
 lang-merge:
-       $(foreach i, $(shell find $(outdir) -name '*.html' | xargs grep -L 'UNTRANSLATED NODE: IGNORE ME'), ln -f $(i) $(i:$(outdir)/%.html=$(depth)/Documentation/user/$(outdir)/%.$(ISOLANG).html) &&) true
+       $(foreach i, $(shell find $(outdir) -name '*.html' | xargs grep -L --label="" 'UNTRANSLATED NODE: IGNORE ME'), ln -f $(i) $(i:$(outdir)/%.html=$(depth)/Documentation/user/$(outdir)/%.$(ISOLANG).html) &&) true
 
 png-ln:
        mkdir -p $(outdir)/lilypond