Renaming test files according to their language (#3407)

test/tw-2124.test.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# A test case for TW-2124.
+# https://github.com/GothenburgBitFactory/taskwarrior/issues/2124
+
+. bash_tap_tw.sh
+
+# Filtering for description with a dash works
+task add foo-bar
+task foo-bar list | grep foo-bar
+
+# Filtering for tag with dash does not work right now
+export EXPFAIL=true
+
+task add test +one-two
+task +one-two list