Reduce indentation level by early returning or continuing loop

Replace code like this

```c
func() {
    if (cond) {
	...
	...
	...
    }
    return ret;
}
```

```c
for (...) {
    if (cond) {
	...
	...
	...
    }
}
```

with

```c
func() {
    if (!cond) {
	return ret;
    }
    ...
    ...
    ...
}
```

```c
for (...) {
    if (!cond) {
	continue;
    }
    ...
    ...
    ...
}
```

1 files changed, 20 insertions, 19 deletions

diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 45ab901398..71cb83e566 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -5987,29 +5987,30 @@ static char_u *dict2string(typval_T *tv, int copyID)
 
   todo = (int)d->dv_hashtab.ht_used;
   for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi) {
-    if (!HASHITEM_EMPTY(hi)) {
-      --todo;
+    if (HASHITEM_EMPTY(hi)) {
+      continue;
+    }
+    --todo;
 
-      if (first)
-        first = FALSE;
-      else
-        ga_concat(&ga, (char_u *)", ");
+    if (first)
+      first = FALSE;
+    else
+      ga_concat(&ga, (char_u *)", ");
 
-      tofree = string_quote(hi->hi_key, FALSE);
-      if (tofree != NULL) {
-        ga_concat(&ga, tofree);
-        free(tofree);
-      }
-      ga_concat(&ga, (char_u *)": ");
-      s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf, copyID);
-      if (s != NULL)
-        ga_concat(&ga, s);
+    tofree = string_quote(hi->hi_key, FALSE);
+    if (tofree != NULL) {
+      ga_concat(&ga, tofree);
       free(tofree);
-      if (s == NULL || did_echo_string_emsg) {
-        break;
-      }
-      line_breakcheck();
     }
+    ga_concat(&ga, (char_u *)": ");
+    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf, copyID);
+    if (s != NULL)
+      ga_concat(&ga, s);
+    free(tofree);
+    if (s == NULL || did_echo_string_emsg) {
+      break;
+    }
+    line_breakcheck();
   }
   if (todo > 0) {
     free(ga.ga_data);