Variable expansion bug.

TODO.md

@@ -0,0 +1,20 @@
+
+# Short-term
+    * Unit tests.
+    * Expanding regex matches in targets.
+    * Dummy rule for multiple explicit targets
+    * Expand `$newprereq`.
+    * Expand `$alltargets`.
+    * Man page.
+    * Namelist syntax.
+    * Environment variables.
+
+# Long-term
+    * Nicer syntax for alternative-shell rules.
+    * An attribute to demand n processors for a particular rule. This way
+      resource hog rules can be run on their own without disabling parallel
+      make.
+    * A switch that prints the rules that will be executed and prompts to user
+      to do so. I often find myself doing `mk -n` before `mk` to make sure my
+      rules aren't bogus.
+