Fixed typo in copyright update script
diff --git a/build-scripts/update-copyright.sh b/build-scripts/update-copyright.sh
index 84d563b..84437ce 100755
--- a/build-scripts/update-copyright.sh
+++ b/build-scripts/update-copyright.sh
@@ -2,7 +2,7 @@
find . -type f -exec grep -Il "Copyright" {} \; \
| grep -v \.hg \
-| while read $file; \
+| while read file; \
do \
LC_ALL=C sed -ie "s/\(.*Copyright.*\)[0-9]\{4\}\( *Sam Lantinga\)/\1`date +%Y`\2/" "$file"; \
rm "${file}e"; \