use * for pointer type instead of &

See #770

To help automatically translate code, see the
zig-fmt-pointer-reform-2 branch.

This will convert all & into *. Due to the syntax
ambiguity (which is why we are making this change),
even address-of & will turn into *, so you'll have
to manually fix thes instances. You will be guaranteed
to get compile errors for them - expected 'type', found 'foo'

std/buf_set.zig

@@ -9,12 +9,12 @@ pub const BufSet = struct {
 
     const BufSetHashMap = HashMap([]const u8, void, mem.hash_slice_u8, mem.eql_slice_u8);
 
-    pub fn init(a: &Allocator) BufSet {
+    pub fn init(a: *Allocator) BufSet {
         var self = BufSet{ .hash_map = BufSetHashMap.init(a) };
         return self;
     }
 
-    pub fn deinit(self: &const BufSet) void {
+    pub fn deinit(self: *const BufSet) void {
         var it = self.hash_map.iterator();
         while (true) {
             const entry = it.next() ?? break;
@@ -24,7 +24,7 @@ pub const BufSet = struct {
         self.hash_map.deinit();
     }
 
-    pub fn put(self: &BufSet, key: []const u8) !void {
+    pub fn put(self: *BufSet, key: []const u8) !void {
         if (self.hash_map.get(key) == null) {
             const key_copy = try self.copy(key);
             errdefer self.free(key_copy);
@@ -32,28 +32,28 @@ pub const BufSet = struct {
         }
     }
 
-    pub fn delete(self: &BufSet, key: []const u8) void {
+    pub fn delete(self: *BufSet, key: []const u8) void {
         const entry = self.hash_map.remove(key) ?? return;
         self.free(entry.key);
     }
 
-    pub fn count(self: &const BufSet) usize {
+    pub fn count(self: *const BufSet) usize {
         return self.hash_map.count();
     }
 
-    pub fn iterator(self: &const BufSet) BufSetHashMap.Iterator {
+    pub fn iterator(self: *const BufSet) BufSetHashMap.Iterator {
         return self.hash_map.iterator();
     }
 
-    pub fn allocator(self: &const BufSet) &Allocator {
+    pub fn allocator(self: *const BufSet) *Allocator {
         return self.hash_map.allocator;
     }
 
-    fn free(self: &const BufSet, value: []const u8) void {
+    fn free(self: *const BufSet, value: []const u8) void {
         self.hash_map.allocator.free(value);
     }
 
-    fn copy(self: &const BufSet, value: []const u8) ![]const u8 {
+    fn copy(self: *const BufSet, value: []const u8) ![]const u8 {
         const result = try self.hash_map.allocator.alloc(u8, value.len);
         mem.copy(u8, result, value);
         return result;