DOC: Convert titles to sentence case (#23643)

Partially addresses #16261.

1 files changed, 11 insertions, 11 deletions

diff --git a/doc/source/reference/arrays.nditer.rst b/doc/source/reference/arrays.nditer.rst
index 8cabc1a06..fb1c91a07 100644
--- a/doc/source/reference/arrays.nditer.rst
+++ b/doc/source/reference/arrays.nditer.rst
@@ -3,7 +3,7 @@
 .. _arrays.nditer:
 
 *********************
-Iterating Over Arrays
+Iterating over arrays
 *********************
 
 .. note::
@@ -23,7 +23,7 @@ can accelerate the inner loop in Cython. Since the Python exposure of
 iterator API, these ideas will also provide help working with array
 iteration from C or C++.
 
-Single Array Iteration
+Single array iteration
 ======================
 
 The most basic task that can be done with the :class:`nditer` is to
@@ -64,7 +64,7 @@ namely the order they are stored in memory, whereas the elements of
 `a.T.copy(order='C')` get visited in a different order because they
 have been put into a different memory layout.
 
-Controlling Iteration Order
+Controlling iteration order
 ---------------------------
 
 There are times when it is important to visit the elements of an array
@@ -88,7 +88,7 @@ order='C' for C order and order='F' for Fortran order.
 
 .. _nditer-context-manager:
 
-Modifying Array Values
+Modifying array values
 ----------------------
 
 By default, the :class:`nditer` treats the input operand as a read-only
@@ -128,7 +128,7 @@ note that prior to 1.15, :class:`nditer` was not a context manager and
 did not have a `close` method. Instead it relied on the destructor to
 initiate the writeback of the buffer.
 
-Using an External Loop
+Using an external loop
 ----------------------
 
 In all the examples so far, the elements of `a` are provided by the
@@ -161,7 +161,7 @@ elements each.
     ...
     [0 3] [1 4] [2 5]
 
-Tracking an Index or Multi-Index
+Tracking an index or multi-index
 --------------------------------
 
 During iteration, you may want to use the index of the current
@@ -210,7 +210,7 @@ raise an exception.
       File "<stdin>", line 1, in <module>
     ValueError: Iterator flag EXTERNAL_LOOP cannot be used if an index or multi-index is being tracked
 
-Alternative Looping and Element Access
+Alternative looping and element access
 --------------------------------------
 
 To make its properties more readily accessible during iteration,
@@ -246,7 +246,7 @@ produce identical results to the ones in the previous section.
     array([[ 0,  1,  2],
            [-1,  0,  1]])
 
-Buffering the Array Elements
+Buffering the array elements
 ----------------------------
 
 When forcing an iteration order, we observed that the external loop
@@ -274,7 +274,7 @@ is enabled.
     ...
     [0 3 1 4 2 5]
 
-Iterating as a Specific Data Type
+Iterating as a specific data type
 ---------------------------------
 
 There are times when it is necessary to treat an array as a different
@@ -382,7 +382,7 @@ would violate the casting rule.
       File "<stdin>", line 2, in <module>
     TypeError: Iterator requested dtype could not be cast from dtype('float64') to dtype('int64'), the operand 0 dtype, according to the rule 'same_kind'
 
-Broadcasting Array Iteration
+Broadcasting array iteration
 ============================
 
 NumPy has a set of rules for dealing with arrays that have differing
@@ -417,7 +417,7 @@ which includes the input shapes to help diagnose the problem.
     ...
     ValueError: operands could not be broadcast together with shapes (2,) (2,3)
 
-Iterator-Allocated Output Arrays
+Iterator-allocated output arrays
 --------------------------------
 
 A common case in NumPy functions is to have outputs allocated based