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-rw-r--r--src/runtime/haskell/PGF/VisualizeTree.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/runtime/haskell/PGF/VisualizeTree.hs b/src/runtime/haskell/PGF/VisualizeTree.hs
index 855e40d75..cb6affe41 100644
--- a/src/runtime/haskell/PGF/VisualizeTree.hs
+++ b/src/runtime/haskell/PGF/VisualizeTree.hs
@@ -396,7 +396,7 @@ graphvizAlignment pgf langs exp =
renderList ii [] _ = empty
renderList ii [l] [] = struct ii <> text "[label = \"" <> fields l <> text "\"] ;"
- fields cs = hsep (intersperse (char '|') [tbrackets (tag id) <> text w | (id,ws) <- cs, w <- ws])
+ fields cs = hsep (intersperse (char '|') [tbrackets (tag id) <> text (' ':w) | (id,ws) <- cs, w <- ws])