There is not normally an empty line after an enhanced error printout. See Clojure, and for example, see this example in ClojureScript:
cljs.user=> (require '[cljs.core.specs.alpha])
nil
cljs.user=> (let [1])
Syntax error macroexpanding cljs.core/let at (<cljs repl>:1:1).
[1] - failed: even-number-of-forms? at: [:bindings] spec: :cljs.core.specs.alpha/bindings
cljs.user=>
But, with CLJS-2945 and CLJS-3011 you can see that there is an extra blank line for {{:clojure.error.phase}} {{:execution}} printing.
The attached patch eliminates this extra blank line, making things consistent within ClojureScript and also consistent with Clojure. Here is an example with the patch:
cljs.user=> (ffirst 1)
Execution error (Error) at (<cljs repl>:1).
1 is not ISeqable
cljs.user=>
and without the patch you would see:
`
cljs.user=> (ffirst 1)
Execution error (Error) at (:1).
1 is not ISeqable
cljs.user=>
`
A slight difficulty is that the enhanced error printing strings have newlines at the end. See for example:
https://github.com/clojure/clojurescript/blob/6ccb629e365f46a9516e4defeced652cce9d4d35/src/main/cljs/cljs/repl.cljs#L188
The display error code is used for other errors, so the fix taken in this patch is to enforce uniformity by employing {{trimr}}.
