Subject: bug#36970: 26.2; invalid-read-syntax could print the location of the error

From: ndame <[email-masked]>
Date: Thu, 8 Aug 2019 10:27:55 +0200 (CEST)

It only says:

    (invalid-read-syntax ". in wrong context")

It could also print the character location or even the line number and
the position in the line to make it easy to find the error.