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-rwxr-xr-xtool/expand-config.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/tool/expand-config.rb b/tool/expand-config.rb
index 0b6fa54b30..bb88865709 100755
--- a/tool/expand-config.rb
+++ b/tool/expand-config.rb
@@ -9,7 +9,7 @@ config["RUBY_RELEASE_DATE"] ||=
while /\A(\w+)=(.*)/ =~ ARGV[0]
config[$1] = $2
- config[$1].tr(File::ALT_SEPARATOR, File::SEPARATOR) if File::ALT_SEPARATOR
+ config[$1].tr!(File::ALT_SEPARATOR, File::SEPARATOR) if File::ALT_SEPARATOR
ARGV.shift
end