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-rw-r--r--railties/lib/rails/source_annotation_extractor.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/railties/lib/rails/source_annotation_extractor.rb b/railties/lib/rails/source_annotation_extractor.rb
index e9088c44ce..0412d725df 100644
--- a/railties/lib/rails/source_annotation_extractor.rb
+++ b/railties/lib/rails/source_annotation_extractor.rb
@@ -45,7 +45,7 @@ class SourceAnnotationExtractor
# If +options+ has a flag <tt>:tag</tt> the tag is shown as in the example above.
# Otherwise the string contains just line and text.
def to_s(options = {})
- s = "[#{line.to_s.rjust(options[:indent])}] "
+ s = "[#{line.to_s.rjust(options[:indent])}] ".dup
s << "[#{tag}] " if options[:tag]
s << text
end