Rephrase so it doesn’t imply we don’t minify React

content/blog/2017-12-15-improving-the-repository-infrastructure.md

@@ -103,7 +103,7 @@ You can find our Rollup build configuration [here](https://github.com/facebook/r
 
 After migrating to flat bundles, we [started](https://github.com/facebook/react/pull/10236) using [the JavaScript version of the Google Closure Compiler](https://github.com/google/closure-compiler-js) in its "simple" mode. In our experience, even with the advanced optimizations disabled, it still provided a significant advantage over Uglify, as it was able to better eliminate dead code and automatically inline small functions when appropriate.
 
-At first, we could only use Google Closure Compiler for the React bundles we shipped in the open source. At Facebook, we still needed the code to be unminified so that we can diagnose React bugs in production from the stack traces. We ended up contributing [a flag](https://github.com/google/closure-compiler/pull/2707) that completely disables the renaming compiler pass. This lets us apply other optimizations like function inlining, but keep the code fully readable for the Facebook-specific builds of React. To improve the output readability, we [also format that custom build using Prettier](https://github.com/facebook/react/blob/cc52e06b490e0dc2482b345aa5d0d65fae931095/scripts/rollup/build.js#L249-L250). Interestingly, running Prettier on production bundles while debugging the build process is a great way to find unnecessary code in the bundles!
+At first, we could only use Google Closure Compiler for the React bundles we shipped in the open source. At Facebook, we still needed the checked-in bundles to be unminified so we could symbolicate React production crashes with our error reporting tools. We ended up contributing [a flag](https://github.com/google/closure-compiler/pull/2707) that completely disables the renaming compiler pass. This lets us apply other optimizations like function inlining, but keep the code fully readable for the Facebook-specific builds of React. To improve the output readability, we [also format that custom build using Prettier](https://github.com/facebook/react/blob/cc52e06b490e0dc2482b345aa5d0d65fae931095/scripts/rollup/build.js#L249-L250). Interestingly, running Prettier on production bundles while debugging the build process is a great way to find unnecessary code in the bundles!
 
 Currently, all production React bundles [run through Google Closure Compiler in simple mode](https://github.com/facebook/react/blob/cc52e06b490e0dc2482b345aa5d0d65fae931095/scripts/rollup/build.js#L235-L248), and we may look into enabling advanced optimizations in the future.