Merge pull request karpathy#275 from apivovarov/rm_unsqueeze

Remove pos unsqueeze(0)

model.py

@@ -178,11 +178,11 @@ def forward(self, idx, targets=None):
         device = idx.device
         b, t = idx.size()
         assert t <= self.config.block_size, f"Cannot forward sequence of length {t}, block size is only {self.config.block_size}"
-        pos = torch.arange(0, t, dtype=torch.long, device=device).unsqueeze(0) # shape (1, t)
+        pos = torch.arange(0, t, dtype=torch.long, device=device) # shape (t)
 
         # forward the GPT model itself
         tok_emb = self.transformer.wte(idx) # token embeddings of shape (b, t, n_embd)
-        pos_emb = self.transformer.wpe(pos) # position embeddings of shape (1, t, n_embd)
+        pos_emb = self.transformer.wpe(pos) # position embeddings of shape (t, n_embd)
         x = self.transformer.drop(tok_emb + pos_emb)
         for block in self.transformer.h:
             x = block(x)