Concept Exercise for Strings about elm

[pwadsworth]

There is one last thing we should do on this issue before closing: go through existing practice exercises and add the "strings" concept to the relevant ones ("prerequisites" field for concept exercises and "prerequisites"/"practices" for practice exercises). We already have the (obsolete) "topics" on the exercises, which sometimes contains "strings". That should help.

I'll tackle this over the next week.

[jiegillet]

There is one last thing we should do on this issue before closing: go through existing practice exercises and add the "strings" concept to the relevant ones ("prerequisites" field for concept exercises and "prerequisites"/"practices" for practice exercises).
We already have the (obsolete) "topics" on the exercises, which sometimes contains "strings". That should help.

[jiegillet]

Closed via #629