Add debug message to sigil generation.

This will help indicate how much time is spent on it.

tcshrc.prompt.defs

@@ -104,6 +104,7 @@ set referencechars_raw="${referencechars_raw} 2620"
 set prompt_hcolor=0
 set prompt_hsym=0
 
+_debug "Building unicode sigils table...."
 if( ! $?CSHENV_NO_UNICODE_PRINTF ) then
 	set referencechars=()
 	foreach ch ($referencechars_raw)
@@ -114,6 +115,7 @@ else
 	# Safe fallback for when there's no unicode printf
 	set referencechars="A B C D X Y Z"
 endif
+_debug "Done building unicode sigils table"
 
 # Rotation
 alias precmd 'source ${CSHENV_DIR}/tcshrc.prompt.final'