fix the | virtual cursor character appearing in completion output

src/fennel-ls/completion.fnl

@@ -62,7 +62,8 @@ is set to true and we report that we support completionItem/resolve."
         seen {}]
 
     (fn add-completion! [name definition ?kind]
-      (table.insert results (format.completion-item-format server name definition range ?kind)))
+      (when (and symbol (not= name (tostring symbol)))
+        (table.insert results (format.completion-item-format server name definition range ?kind))))
 
     (fn add-completion-recursively! [name definition]
       "add the completion. also recursively adds the fields' completions"

test/completion.fnl

@@ -290,15 +290,22 @@
   nil)
 
 (fn test-no-completion []
+  ;; comment
   (check "; ("
     []
     [:math])
+  ;; inside of a string
   (check "\" (|\n\""
     []
     [:math])
+  ;; inside of a string, but the starting quote is on a different line
   (check "\"\n(|\""
     []
     [:math])
+
+  (check "(fn foo|)"
+    []
+    ["foo|"])
   nil)
 
 ;; ;; Future tests / features