docs: improve clarity in standard deviation documentation

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Author: gururaj1512

lib/node_modules/@stdlib/stats/base/stdevpn/docs/repl.txt

@@ -3,8 +3,8 @@
     Computes the standard deviation of a strided array using a two-pass
     algorithm.
 
-    The `N` and stride parameters determine which elements in the strided array are accessed
-    at runtime.
+    The `N` and stride parameters determine which elements in the strided array
+    are accessed at runtime.
 
     Indexing is relative to the first index. To introduce an offset, use a typed
     array view.
@@ -57,6 +57,7 @@
     > {{alias}}( 3, 1, x1, 2 )
     ~2.0817
 
+
 {{alias}}.ndarray( N, correction, x, strideX, offsetX )
     Computes the standard deviation of a strided array using a two-pass
     algorithm and alternative indexing semantics.
@@ -86,7 +87,7 @@
         Input array.
 
     strideX: integer
-        Index increment.
+        Stride length.
 
     offsetX: integer
         Starting index.