map_group(): Fix error when mappings start with comment or whitespace

Previously we'd get an error if the first lines in the mappings file
were blank or comments.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/parser.rs b/src/parser.rs
index 3f3d7b9..81f1573 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -630,10 +630,10 @@ where
     I::Error: ParseError<I::Item, I::Range, I::Position>,
 {
     or(
-        (
+        try((
             blank(),
             eof(),
-        ).map(|_| MapGroup::default()),
+        )).map(|_| MapGroup::default()),
         (
             definitions(),
             eof(),