Add forward-compatibility for storage type parameter

The Rust rewrite of vdirsyncer requires explicitly specifying what type
of "filesystem" storage is being used. These can be either
"filesystem/icalendar" or "filesystem/vcard".

Add forward-compatibility with this upcoming format, by allowing (but
ignoring) a slash and anything after it.

This makes configuration files that have been updated for the Rust
implementation compatible with the Python implementation.

Closes: #1075

Author: WhyNotHugo

CHANGELOG.rst

@@ -15,6 +15,10 @@ Version 0.19.2
 - Improve the performance of ``SingleFileStorage``. :gh:`818`
 - Properly document some caveats of the Google Contacts storage.
 - Fix crash when using auth certs. :gh:`1033`
+- The ``filesystem`` storage can be specified with ``type =
+  "filesystem/icalendar"`` or ``type = "filesystem/vcard"``. This has not
+  functional impact, and is merely for forward compatibility with the Rust
+  implementation of vdirsyncer.
 
 Version 0.19.1
 ==============

vdirsyncer/cli/tasks.py

@@ -110,7 +110,8 @@ async def repair_collection(
         storage_name, collection = storage_name.split("/")
 
     config = config.get_storage_args(storage_name)
-    storage_type = config["type"]
+    # If storage type has a slash, ignore it and anything after it.
+    storage_type = config["type"].split("/")[0]
 
     if collection is not None:
         cli_logger.info("Discovering collections (skipping cache).")