[cmdpalette] fix scoring of space-separated search terms

Previously only the score for the final search term was used.

visidata/fuzzymatch.py

@@ -375,15 +375,17 @@ def fuzzymatch(vd, haystack:"list[dict[str, str]]", needles:"list[str]) -> list[
         formatted_hay = {}
         for k, v in h.items():
             if k[0] == '_': continue
+            positions = set()
             for p in needles:
                 mr = _fuzzymatch(v, p)
                 if mr.score > 0:
-                    match[k] = mr
-                    formatted_hay[k] = _format_match(v, mr.positions)
+                    match.setdefault(k, []).append(mr)
+                    positions |= set(mr.positions)
+            formatted_hay[k] = _format_match(v, positions)
 
         if match:
             # square to prefer larger scores in a single haystack
-            score = int(sum(mr.score**2 for mr in match.values()))
+            score = int(sum([mr.score**2 for mrs in match.values() for mr in mrs]))
             matches.append(CombinedMatch(score=score, formatted=formatted_hay, match=h))
 
     return sorted(matches, key=lambda m: -m.score)