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-rw-r--r--src/boot/tokens.boot2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/boot/tokens.boot b/src/boot/tokens.boot
index c4cf1664..307da560 100644
--- a/src/boot/tokens.boot
+++ b/src/boot/tokens.boot
@@ -44,7 +44,7 @@ shoeStartsId x ==
alphabetic? x or x in [char "$", char "?", char "%"]
shoeIdChar x ==
- alphanumeric? x or x in [char "'", char "?", char "%"]
+ alphanumeric? x or x in [char "'", char "?", char "%", char "!"]
++ return the sub-string of `s' starting from `f'.
++ When non-nil, `n' designates the length of the sub-string.