add infill example

examples/simple-fill-in-middle/main.py

@@ -0,0 +1,22 @@
+from ollama import generate
+
+prefix = '''def remove_non_ascii(s: str) -> str:
+    """ '''
+
+suffix = '''
+    return result
+'''
+
+
+response = generate(
+  model='codellama:7b-code',
+  prompt=f'<PRE> {prefix} <SUF>{suffix} <MID>',
+  options={
+    'num_predict': 128,
+    'temperature': 0,
+    'top_p': 0.9,
+    'stop': ['<EOT>'],
+  },
+)
+
+print(response['response'])