michael@0: Rather than make changes to the built files here, make them upstream and then
michael@0: upgrade our tree's copy of the built files.
michael@0: 
michael@0: To upgrade the source-map library:
michael@0: 
michael@0:     $ git clone https://github.com/mozilla/source-map.git
michael@0:     $ git co source-map
michael@0:     $ git co <latest-tagged-version>
michael@0:     $ npm run-script build
michael@0:     $ cp dist/SourceMap.jsm /path/to/mozilla-central/toolkit/devtools/sourcemap/SourceMap.jsm
michael@0:     $ cp dist/test/* /path/to/mozilla-central/toolkit/devtools/sourcemap/tests/unit/
michael@0: