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-rw-r--r--src/compiler/GF/Command/Commands.hs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/compiler/GF/Command/Commands.hs b/src/compiler/GF/Command/Commands.hs
index 48f9b4f49..d320396d5 100644
--- a/src/compiler/GF/Command/Commands.hs
+++ b/src/compiler/GF/Command/Commands.hs
@@ -407,6 +407,9 @@ allCommands env@(pgf, mos) = Map.fromList [
"If a grammar with the same concrete name is already in the state",
"it is overwritten - but only if compilation succeeds.",
"The grammar parser depends on the file name suffix:",
+ " .cf context-free (labelled BNF) source",
+ " .ebnf extended BNF source",
+ " .gfm multi-module GF source",
" .gf normal GF source",
" .gfo compiled GF source",
" .pgf precompiled grammar in Portable Grammar Format"