docs: fix invalid json in `api.md`

docs/api.md

@@ -62,27 +62,28 @@ A stream of JSON objects:
 
 The final response in the stream also includes additional data about the generation:
 
+- `total_duration`: time spent generating the response
+- `load_duration`: time spent in nanoseconds loading the model
+- `sample_count`: number of samples generated
+- `sample_duration`: time spent generating samples
+- `prompt_eval_count`: number of tokens in the prompt
+- `prompt_eval_duration`: time spent in nanoseconds evaluating the prompt
+- `eval_count`: number of tokens the response
+- `eval_duration`: time in nanoseconds spent generating the response
+
+To calculate how fast the response is generated in tokens per second (token/s), divide `eval_count` / `eval_duration`.
+
 ```json
 {
   "model": "llama2:7b",
   "created_at": "2023-08-04T19:22:45.499127Z",
   "done": true,
-
-  // total time in nanoseconds spent generating the response
   "total_duration": 5589157167,
-
-  // time spent in nanoseconds loading the model
   "load_duration": 3013701500,
-
-  // Sample: how fast tokens were sampled
   "sample_count": 114,
   "sample_duration": 81442000,
-
-  // Prompt stats: how fast the prompt was evaluated
   "prompt_eval_count": 46,
   "prompt_eval_duration": 1160282000,
-
-  // Eval stats: how fast tokens were generated by the model
   "eval_count": 113,
   "eval_duration": 1325948000
 }