manipulate words and CURRENT to fix magic completions in Zsh

jc/shell_completions.py

@@ -179,8 +179,9 @@ _jc() {
     # if magic command is found anywhere in the line, use called command's autocompletion
     for i in $${words:0:-1}; do
         if (( $$jc_commands[(Ie)$${i}] )); then
-            # still not working 100%. works fine as `jc dig`, but `jc -p dig`
-            # will only complete with files, not program-specific completions
+            shift $$(( $${#words} - 2 )) words
+            words[1,0]=(jc)
+            CURRENT=$${#words}
             _arguments '*::arguments:_normal'
             return 0
         fi