vim-patch:9.0.0568: autocmd code is indented more than needed (#20318)

Problem:    Autocmd code is indented more than needed.
Solution:   Break out sooner. (Yegappan Lakshmanan, closes vim/vim#11208)
            Also in user function code.
e9dcf13a30

src/nvim/autocmd.c

@@ -478,9 +478,13 @@ void augroup_del(char *name, bool stupid_legacy_mode)
   int i = augroup_find(name);
   if (i == AUGROUP_ERROR) {  // the group doesn't exist
     semsg(_("E367: No such group: \"%s\""), name);
-  } else if (i == current_augroup) {
+    return;
+  }
+  if (i == current_augroup) {
     emsg(_("E936: Cannot delete the current group"));
-  } else {
+    return;
+  }
+
   if (stupid_legacy_mode) {
     FOR_ALL_AUEVENTS(event) {
       FOR_ALL_AUPATS_IN_EVENT(event, ap) {
@@ -506,7 +510,6 @@ void augroup_del(char *name, bool stupid_legacy_mode)
   augroup_map_del(i, name);
   au_cleanup();
 }
-}
 
 /// Find the ID of an autocmd group name.
 ///
@@ -733,7 +736,6 @@ char *au_event_disable(char *what)
   }
   set_string_option_direct("ei", -1, new_ei, OPT_FREE, SID_NONE);
   xfree(new_ei);
-
   return save_ei;
 }
 
@@ -837,14 +839,16 @@ void do_autocmd(char *arg_in, int forceit)
 
     bool invalid_flags = false;
     for (size_t i = 0; i < 2; i++) {
-      if (*cmd != NUL) {
+      if (*cmd == NUL) {
+        continue;
+      }
+
       invalid_flags |= arg_autocmd_flag_get(&once, &cmd, "++once", 6);
       invalid_flags |= arg_autocmd_flag_get(&nested, &cmd, "++nested", 8);
 
       // Check the deprecated "nested" flag.
       invalid_flags |= arg_autocmd_flag_get(&nested, &cmd, "nested", 6);
     }
-    }
 
     if (invalid_flags) {
       return;
@@ -1275,6 +1279,7 @@ void ex_doautoall(exarg_T *eap)
     if (buf->b_ml.ml_mfp == NULL || buf == curbuf) {
       continue;
     }
+
     // Find a window for this buffer and save some values.
     aucmd_prepbuf(&aco, buf);
     set_bufref(&bufref, buf);

src/nvim/eval/userfunc.c

@@ -515,9 +515,11 @@ static char *fname_trans_sid(const char *const name, char *const fname_buf, char
                              int *const error)
   FUNC_ATTR_NONNULL_ALL FUNC_ATTR_WARN_UNUSED_RESULT
 {
-  char *fname;
   const int llen = eval_fname_script(name);
-  if (llen > 0) {
+  if (llen == 0) {
+    return (char *)name;  // no prefix
+  }
+
   fname_buf[0] = (char)K_SPECIAL;
   fname_buf[1] = (char)KS_EXTRA;
   fname_buf[2] = KE_SNR;
@@ -531,6 +533,7 @@ static char *fname_trans_sid(const char *const name, char *const fname_buf, char
       i = (int)strlen(fname_buf);
     }
   }
+  char *fname;
   if ((size_t)i + strlen(name + llen) < FLEN_FIXED) {
     STRCPY(fname_buf + i, name + llen);
     fname = fname_buf;
@@ -540,10 +543,6 @@ static char *fname_trans_sid(const char *const name, char *const fname_buf, char
     memmove(fname, fname_buf, (size_t)i);
     STRCPY(fname + i, name + llen);
   }
-  } else {
-    fname = (char *)name;
-  }
-
   return fname;
 }