extra newline after error output in REPL

[JeffBezanson]

julia> "a$2"
ERROR: ParseError:
Error: identifier or parenthesized expression expected after $ in string
@ REPL[14]:1:4
"a$2"


julia> 

The error is correct but there is an extra blank line before the next prompt.

[JeffBezanson]

The output would also be much nicer if we can collapse

ERROR: ParseError:
Error: identifier or parenthesized expression expected after $ in string

into a single line, such as

ParseError: identifier or parenthesized expression expected after $ in string

[c42f]

into a single line, such as

ParseError: identifier or parenthesized expression expected after $ in string

Yes. Though to remove the ERROR: prefix we would have to extend the function Base.display_error and that will be inconsistent with how we report other errors. For example, the "double error" prefix occurs in basic things like

julia> 1÷0
ERROR: DivideError: integer division error
Stacktrace:
...

[c42f]

This was fixed some time ago.