kakoune: file and project symbols: support spaces in first token (example css)

uses non-breaking space as a separator and assumes that first numeric
token (starting from second one) is the line number (i.e., assumes that
the searched token does not contain space delimited number)

kakoune/.config/kak/scripts/filesymbols.awk

@@ -0,0 +1,9 @@
+{
+    for (i = 3; i < NF; ++i) {
+        if ($i ~ /^[0-9]+$/) {
+            j = match($0, "[ ]+" $(i-1) "[ ]+" $i " ")
+            print substr($0, 0, j - 1) "\u00a0" $(i-1) "\u00a0" $i
+            break
+        }
+    }
+}