line number in painless compile error is incorrect

[PhaedrusTheGreek]

Given some script with a compile problem:

void doSomething() {
 someVariable.push("asdf")
}

Only the following is included compile error - which doesn't have a correct line number:

Caused by: java.lang.IllegalArgumentException: Variable [someVariable] is not defined.
	at org.elasticsearch.painless.Executable$Script.compile(compile_me.painless:24) ~[?:?]

[jdconrad]

We actually made the decision to make it character rather than line since that information is more helpful for most scripts since they are typically single lines. I thought this was documented, but it's not, so I'll add it to the list of things that need documentation.

[PhaedrusTheGreek]

Character number is fantastic.