merge: move the filtering of ambiguous files to a dedicated function
I have multiple reasons:
- The body of `_update` is way too long
- This adds typing which will help our tooling and brains understand this
code more easily
- This function will get more nested and complex in the next patch
I've taken the liberty of rewrapping and typo-passing the docstring.
#!/bin/sh
# This scripts is used to setup temp directory in memory
# for running Mercurial tests in vritual machine managed
# by Vagrant (see Vagrantfile for details).
cd /hgshared
make local
cd tests
mkdir /tmp/ram
sudo mount -t tmpfs -o size=100M tmpfs /tmp/ram
export TMPDIR=/tmp/ram
./run-tests.py -l --time