refactor: follow style guide

- reduce variable scope
- prefer initialization over declaration and assignment
- use bool to represent boolean values

src/nvim/arglist.c

@@ -254,9 +254,8 @@ void alist_slash_adjust(void)
 static char *do_one_arg(char *str)
 {
   char *p;
-  bool inbacktick;
 
-  inbacktick = false;
+  bool inbacktick = false;
   for (p = str; *str; str++) {
     // When the backslash is used for escaping the special meaning of a
     // character we need to keep it until wildcard expansion.
@@ -834,10 +833,8 @@ char *get_arglist_name(expand_T *xp FUNC_ATTR_UNUSED, int idx)
 /// Get the file name for an argument list entry.
 char *alist_name(aentry_T *aep)
 {
-  buf_T *bp;
-
   // Use the name from the associated buffer if it exists.
-  bp = buflist_findnr(aep->ae_fnum);
+  buf_T *bp = buflist_findnr(aep->ae_fnum);
   if (bp == NULL || bp->b_fname == NULL) {
     return aep->ae_fname;
   }