vim-patch:8.2.3825: various comments could be improved

Problem:    Various comments could be improved.
Solution:   Improve the comments.
52797bae17

src/nvim/getchar.c

@@ -1894,7 +1894,7 @@ static int handle_mapping(int *keylenp, bool *timedout, int *mapdepth)
     // buffer right here. Otherwise, use the mapping (loop around).
     if (mp == NULL) {
       *keylenp = keylen;
-      return map_result_get;  // got character, break for loop
+      return map_result_get;  // get character from typeahead
     } else {
       keylen = mp_match_len;
     }
@@ -2166,7 +2166,7 @@ static int vgetorpeek(bool advance)
               KeyNoremap = typebuf.tb_noremap[typebuf.tb_off];
               del_typebuf(1, 0);
             }
-            break;
+            break;  // got character, break the for loop
           }
 
           // not enough characters, get more