that is pinned to the latest release on PyPI. If you'd rather run on
master, this is also an option.
+
+## Ignoring non-modified files
+
+*Black* remembers files it already formatted, unless the `--diff` flag is used or
+code is passed via standard input. This information is stored per-user. The exact
+location of the file depends on the black version and the system on which black
+is run. The file is non-portable. The standard location on common operating systems
+is:
+
+* Windows: `C:\\Users\<username>\AppData\Local\black\black\Cache\<version>\cache.pickle`
+* macOS: `/Users/<username>/Library/Caches/black/<version>/cache.pickle`
+* Linux: `/home/<username>/.cache/black/<version>/cache.pickle`
+
+
## Testimonials
**Dusty Phillips**, [writer](https://smile.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=dusty+phillips):
## Change Log
-### 18.4a3
+### 18.4a3 (unreleased)
+
+* added a "cache"; files already reformatted that haven't changed on disk
+ won't be reformatted again (#109)
* generalized star expression handling, including double stars; this
fixes multiplication making expressions "unsafe" for trailing commas (#132)
-* fix parsing of complex expressions after star and double stars in
+* fixed parsing of complex expressions after star and double stars in
function parameters (#2)
+* fixed invalid splitting on comma in lambda arguments (#133)
+
### 18.4a2
* fixed parsing of unaligned standalone comments (#99, #112)
* [Eli Treuherz](mailto:eli.treuherz@cgi.com)
* Hugo van Kemenade
* [Ivan Katanić](mailto:ivan.katanic@gmail.com)
+* [Jonas Obrist](mailto:ojiidotch@gmail.com)
* [Osaetin Daniel](mailto:osaetindaniel@gmail.com)