Add missing case for Clojure 1.10 syntax errors (#3506)

Loading a buffer sometimes fails silently, since `cider-handle-compilation-errors` currently does not properly parse all syntax errors.

The pattern matches:

> Syntax error compiling at
> Syntax error macroexpanding at

but needs to also match:

> Syntax error reading source at

This commit fixes this by adding the missing string to the regex.

Author: magnars

cider-eval.el

@@ -562,7 +562,8 @@ It delegates the actual error content to the eval or op handler."
                                      "Syntax error "
                                      (minimal-match (zero-or-more anything))
                                      (or "compiling "
-                                         "macroexpanding ")
+                                         "macroexpanding "
+                                         "reading source ")
                                      (minimal-match (zero-or-more anything))
                                      "at ("
                                      (group-n 2 (minimal-match (zero-or-more anything)))

test/cider-eval-tests.el

@@ -55,5 +55,7 @@
             :to-equal '("src/haystack/analyzer.clj" 18 1 cider-error-highlight-face "Syntax error compiling clojure.core/let at (src/haystack/analyzer.clj:18:1).\n[1] - failed: even-number-of-forms? at: [:bindings] spec: :clojure.core.specs.alpha/bindings\n"))
     (expect (cider-extract-error-info cider-compilation-regexp "Syntax error macroexpanding clojure.core/let at (src/haystack/analyzer.clj:18:1).\n[1] - failed: even-number-of-forms? at: [:bindings] spec: :clojure.core.specs.alpha/bindings\n")
             :to-equal '("src/haystack/analyzer.clj" 18 1 cider-error-highlight-face "Syntax error macroexpanding clojure.core/let at (src/haystack/analyzer.clj:18:1).\n[1] - failed: even-number-of-forms? at: [:bindings] spec: :clojure.core.specs.alpha/bindings\n"))
+    (expect (cider-extract-error-info cider-compilation-regexp "Syntax error reading source at (/Users/vemv/haystack/src/haystack/parser.cljc:13:0).")
+            :to-equal '("/Users/vemv/haystack/src/haystack/parser.cljc" 13 0 cider-error-highlight-face "Syntax error reading source at (/Users/vemv/haystack/src/haystack/parser.cljc:13:0)."))
     (expect (cider-extract-error-info cider-compilation-regexp "Syntax error FOOING clojure.core/let at (src/haystack/analyzer.clj:18:1).\n[1] - failed: even-number-of-forms? at: [:bindings] spec: :clojure.core.specs.alpha/bindings\n")
             :to-equal nil)))