Minor/basic text fixes (#2229)

* Small clarification

Matches line 431 to line 435 for additional clarity and consistency.

* Fixed minor typo

The letter "s" was previously omitted from the word "docstrings".

CONTRIBUTING.md

@@ -168,7 +168,7 @@ Follow these steps to start contributing:
    to be merged;
 4. Make sure pre-existing tests still pass;
 5. Add high-coverage tests. No quality test, no merge;
-6. All public methods must have informative doctrings;
+6. All public methods must have informative docstrings;
 
 
 ### Style guide

examples/run_lm_finetuning.py

@@ -428,9 +428,9 @@ def main():
     parser.add_argument('--gradient_accumulation_steps', type=int, default=1,
                         help="Number of updates steps to accumulate before performing a backward/update pass.")
     parser.add_argument("--learning_rate", default=5e-5, type=float,
-                        help="The initial learning rate for Adam.")
+                        help="The initial learning rate for Adam optimizer.")
     parser.add_argument("--weight_decay", default=0.0, type=float,
-                        help="Weight deay if we apply some.")
+                        help="Weight decay if we apply some.")
     parser.add_argument("--adam_epsilon", default=1e-8, type=float,
                         help="Epsilon for Adam optimizer.")
     parser.add_argument("--max_grad_norm", default=1.0, type=float,