Increase line-width of Declarations.yaml (#18050)

Summary:
There are some line breaks in schema_string of Declarations.yaml.
Is this valid yaml? I am reading yaml-spec.
It seems that the “|” indicator or single/double quote is required to insert line-break.
https://yaml.org/spec/1.2/spec.html
![image](https://user-images.githubusercontent.com/2469618/54405834-1e53ac80-471b-11e9-9925-be13a109eb46.png)
Could you increase line-width of yaml to avoid newline?
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18050

Differential Revision: D14516694

Pulled By: ezyang

fbshipit-source-id: 1db9f3bf131b54a783d668de973915892603189e

diff --git a/aten/src/ATen/gen.py b/aten/src/ATen/gen.py
index 7affbcf..a8a3769 100644 (file)
--- a/aten/src/ATen/gen.py
+++ b/aten/src/ATen/gen.py
@@ -249,7 +249,10 @@ def format_yaml(data):
     noalias_dumper.ignore_aliases = lambda self, data: True
     # Support serializing OrderedDict
     noalias_dumper.add_representer(OrderedDict, dict_representer)
-    return yaml.dump(data, default_flow_style=False, Dumper=noalias_dumper)
+    # Some yaml parsers (e.g. Haskell's) don't understand line breaks.
+    # width=float('Inf') turns off optional line breaks and improves
+    # the portability of the outputted yaml.
+    return yaml.dump(data, default_flow_style=False, Dumper=noalias_dumper, width=float('Inf'))
 
 
 def generate_storage_type_and_tensor(backend, density, scalar_type, declarations):