Update README.md to use consistent quotes

chrisburr · web-flow · commit dfa32a42fcbe · 2018-10-29T14:38:46.000Z
diff --git a/README.md b/README.md
@@ -102,7 +102,7 @@ for df in pbar(read_root('bigfile.root', chunksize=100000)):
 
 # or
 from tqdm import tqdm
-for df in tqdm(read_root('bigfile.root', chunksize=100000), unit="chunks"):
+for df in tqdm(read_root('bigfile.root', chunksize=100000), unit='chunks'):
     # process df here
 ```
 
