Fix invalid escape sequences in some files (#632)

These can be found with the command

python -We:invalid -We::SyntaxWarning -m compileall -f -q src/

Author: asmeurer

src/array_api_stubs/_2021_12/creation_functions.py

@@ -29,7 +29,7 @@ def arange(start: Union[int, float], /, stop: Optional[Union[int, float]] = None
     """
 
 def asarray(obj: Union[array, bool, int, float, NestedSequence, SupportsBufferProtocol], /, *, dtype: Optional[dtype] = None, device: Optional[device] = None, copy: Optional[bool] = None) -> array:
-    """
+    r"""
     Convert the input to an array.
 
     Parameters

src/array_api_stubs/_2021_12/elementwise_functions.py

@@ -598,7 +598,7 @@ def floor(x: array, /) -> array:
     """
 
 def floor_divide(x1: array, x2: array, /) -> array:
-    """
+    r"""
     Rounds the result of dividing each element ``x1_i`` of the input array ``x1`` by the respective element ``x2_i`` of the input array ``x2`` to the greatest (i.e., closest to `+infinity`) integer-value number that is not greater than the division result.
 
     .. note::
@@ -1390,4 +1390,4 @@ def trunc(x: array, /) -> array:
         an array containing the rounded result for each element in ``x``. The returned array must have the same data type as ``x``.
     """
 
-__all__ = ['abs', 'acos', 'acosh', 'add', 'asin', 'asinh', 'atan', 'atan2', 'atanh', 'bitwise_and', 'bitwise_left_shift', 'bitwise_invert', 'bitwise_or', 'bitwise_right_shift', 'bitwise_xor', 'ceil', 'cos', 'cosh', 'divide', 'equal', 'exp', 'expm1', 'floor', 'floor_divide', 'greater', 'greater_equal', 'isfinite', 'isinf', 'isnan', 'less', 'less_equal', 'log', 'log1p', 'log2', 'log10', 'logaddexp', 'logical_and', 'logical_not', 'logical_or', 'logical_xor', 'multiply', 'negative', 'not_equal', 'positive', 'pow', 'remainder', 'round', 'sign', 'sin', 'sinh', 'square', 'sqrt', 'subtract', 'tan', 'tanh', 'trunc']
+__all__ = ['abs', 'acos', 'acosh', 'add', 'asin', 'asinh', 'atan', 'atan2', 'atanh', 'bitwise_and', 'bitwise_left_shift', 'bitwise_invert', 'bitwise_or', 'bitwise_right_shift', 'bitwise_xor', 'ceil', 'cos', 'cosh', 'divide', 'equal', 'exp', 'expm1', 'floor', 'floor_divide', 'greater', 'greater_equal', 'isfinite', 'isinf', 'isnan', 'less', 'less_equal', 'log', 'log1p', 'log2', 'log10', 'logaddexp', 'logical_and', 'logical_not', 'logical_or', 'logical_xor', 'multiply', 'negative', 'not_equal', 'positive', 'pow', 'remainder', 'round', 'sign', 'sin', 'sinh', 'square', 'sqrt', 'subtract', 'tan', 'tanh', 'trunc']

src/array_api_stubs/_2021_12/linalg.py

@@ -444,7 +444,7 @@ def vecdot(x1: array, x2: array, /, *, axis: int = None) -> array:
     """
 
 def vector_norm(x: array, /, *, axis: Optional[Union[int, Tuple[int, ...]]] = None, keepdims: bool = False, ord: Union[int, float, Literal[inf, -inf]] = 2) -> array:
-    """
+    r"""
     Computes the vector norm of a vector (or batch of vectors) ``x``.
 
     Parameters