docs: fix TSDoc issues in several @stdlib/math/iter declarations

Correct documentation-only issues in the TypeScript declaration files
flagged by an audit of the `@stdlib/math/iter` namespace:

- `sequences/nonpositive-even-integers`: the `iter` option `@throws`
  said "nonpositive integer"; `iter` is an iteration count, so it must
  be "nonnegative integer" (matching every sibling sequence package).
- `special/pow`: the summary called the operation the "exponential
  function", but it computes `base^exponent`; reword to "power
  function (i.e., `base` raised to the power `exponent`)".
- `special/ahaversin`: "versed sin" -> "versed sine" in the summary
  and Notes.
- `sequences/integers`: the documented default `iter` value was off by
  two (`18014398509481984` -> `18014398509481982`, i.e.
  `FLOAT64_MAX_SAFE_INTEGER * 2`).
- `tools/map`: add the non-numeric/`NaN` handling Notes bullet that the
  sibling `map2`/`map3` declarations include.
- `special/acoth`: spell out the infinity notation in the domain note
  (`(-infinity,-1]`, `[1,+infinity)`) to match the sibling `acosh`.

This PR addresses only the TypeScript declaration files; the
corresponding README/REPL prose can be synced separately.

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---

Author: Planeshifter

lib/node_modules/@stdlib/math/iter/sequences/integers/docs/types/index.d.ts

@@ -43,7 +43,7 @@ interface Options {
 * -   If an environment supports `Symbol.iterator`, the returned iterator is iterable.
 *
 * @param options - function options
-* @param options.iter - number of iterations (default: 18014398509481984)
+* @param options.iter - number of iterations (default: 18014398509481982)
 * @throws `iter` option must be a nonnegative integer
 * @returns iterator
 *

lib/node_modules/@stdlib/math/iter/sequences/nonpositive-even-integers/docs/types/index.d.ts

@@ -44,7 +44,7 @@ interface Options {
 *
 * @param options - function options
 * @param options.iter - number of iterations (default: 4503599627370497)
-* @throws `iter` option must be a nonpositive integer
+* @throws `iter` option must be a nonnegative integer
 * @returns iterator
 *
 * @example

lib/node_modules/@stdlib/math/iter/special/acoth/docs/types/index.d.ts

@@ -30,7 +30,7 @@ type Iterator = Iter | IterableIterator;
 *
 * ## Notes
 *
-* -   The domain of inverse hyperbolic cotangent is restricted to `(-inf,-1]` and `[1,inf)`. If an iterated value is outside of the domain, the returned iterator returns `NaN`.
+* -   The domain of inverse hyperbolic cotangent is restricted to `(-infinity,-1]` and `[1,+infinity)`. If an iterated value is outside of the domain, the returned iterator returns `NaN`.
 * -   If an environment supports `Symbol.iterator` **and** a provided iterator is iterable, the returned iterator is iterable.
 *
 * @param iterator - input iterator

lib/node_modules/@stdlib/math/iter/special/ahaversin/docs/types/index.d.ts

@@ -26,11 +26,11 @@ import { Iterator as Iter, IterableIterator } from '@stdlib/types/iter';
 type Iterator = Iter | IterableIterator;
 
 /**
-* Returns an iterator which iteratively computes the inverse half-value versed sin.
+* Returns an iterator which iteratively computes the inverse half-value versed sine.
 *
 * ## Notes
 *
-* -   The domain of inverse half-value versed sin is restricted to `[0,1]`. If an iterated value is outside of the domain, the returned iterator returns `NaN`.
+* -   The domain of inverse half-value versed sine is restricted to `[0,1]`. If an iterated value is outside of the domain, the returned iterator returns `NaN`.
 * -   If an environment supports `Symbol.iterator` **and** a provided iterator is iterable, the returned iterator is iterable.
 *
 * @param iterator - input iterator

lib/node_modules/@stdlib/math/iter/special/pow/docs/types/index.d.ts

@@ -26,7 +26,7 @@ import { Iterator as Iter, IterableIterator } from '@stdlib/types/iter';
 type Iterator = Iter | IterableIterator;
 
 /**
-* Returns an iterator which iteratively evaluates the exponential function.
+* Returns an iterator which iteratively evaluates the power function (i.e., `base` raised to the power `exponent`).
 *
 * ## Notes
 *

lib/node_modules/@stdlib/math/iter/tools/map/docs/types/index.d.ts

@@ -52,6 +52,8 @@ type Unary = ( value: number ) => any;
 *
 *     -   `value`: iterated value
 *
+* -   If an iterated value is non-numeric (including `NaN`), the returned iterator returns `NaN`. If non-numeric iterated values are possible, you are advised to provide an iterator which type checks and handles non-numeric values accordingly.
+*
 * -   If an environment supports `Symbol.iterator` **and** a provided iterator is iterable, the returned iterator is iterable.
 *
 * @param iterator - input iterator