diff --git a/lib/node_modules/@stdlib/assert/is-node-duplex-stream-like/test/test.js b/lib/node_modules/@stdlib/assert/is-node-duplex-stream-like/test/test.js
index 068c17734908..166e976ceb8e 100644
--- a/lib/node_modules/@stdlib/assert/is-node-duplex-stream-like/test/test.js
+++ b/lib/node_modules/@stdlib/assert/is-node-duplex-stream-like/test/test.js
@@ -74,7 +74,7 @@ tape( 'the function returns `true` if provided a value which is Node duplex stre
 	t.end();
 });
 
-tape( 'the function returns `false` if  not provided a value which is Node duplex stream-like', function test( t ) {
+tape( 'the function returns `false` if not provided a value which is Node duplex stream-like', function test( t ) {
 	var values;
 	var i;
 
diff --git a/lib/node_modules/@stdlib/assert/is-node-readable-stream-like/test/test.js b/lib/node_modules/@stdlib/assert/is-node-readable-stream-like/test/test.js
index abd48908bfff..948314279684 100644
--- a/lib/node_modules/@stdlib/assert/is-node-readable-stream-like/test/test.js
+++ b/lib/node_modules/@stdlib/assert/is-node-readable-stream-like/test/test.js
@@ -68,7 +68,7 @@ tape( 'the function returns `true` if provided a value which is Node readable st
 	t.end();
 });
 
-tape( 'the function returns `false` if  not provided a value which is Node readable stream-like', function test( t ) {
+tape( 'the function returns `false` if not provided a value which is Node readable stream-like', function test( t ) {
 	var values;
 	var i;
 
diff --git a/lib/node_modules/@stdlib/assert/is-node-stream-like/test/test.js b/lib/node_modules/@stdlib/assert/is-node-stream-like/test/test.js
index c1b512366cb1..679a0af9c9cb 100644
--- a/lib/node_modules/@stdlib/assert/is-node-stream-like/test/test.js
+++ b/lib/node_modules/@stdlib/assert/is-node-stream-like/test/test.js
@@ -62,7 +62,7 @@ tape( 'the function returns `true` if provided a value which is Node stream-like
 	t.end();
 });
 
-tape( 'the function returns `false` if  not provided a value which is Node stream-like', function test( t ) {
+tape( 'the function returns `false` if not provided a value which is Node stream-like', function test( t ) {
 	var values;
 	var i;
 
diff --git a/lib/node_modules/@stdlib/assert/is-node-transform-stream-like/test/test.js b/lib/node_modules/@stdlib/assert/is-node-transform-stream-like/test/test.js
index 4be8d8f9120e..50753ef11001 100644
--- a/lib/node_modules/@stdlib/assert/is-node-transform-stream-like/test/test.js
+++ b/lib/node_modules/@stdlib/assert/is-node-transform-stream-like/test/test.js
@@ -79,7 +79,7 @@ tape( 'the function returns `true` if provided a value which is Node transform s
 	t.end();
 });
 
-tape( 'the function returns `false` if  not provided a value which is Node transform stream-like', function test( t ) {
+tape( 'the function returns `false` if not provided a value which is Node transform stream-like', function test( t ) {
 	var values;
 	var i;
 
diff --git a/lib/node_modules/@stdlib/assert/is-node-writable-stream-like/test/test.js b/lib/node_modules/@stdlib/assert/is-node-writable-stream-like/test/test.js
index 4c53d4815c5b..cf2ea953191a 100644
--- a/lib/node_modules/@stdlib/assert/is-node-writable-stream-like/test/test.js
+++ b/lib/node_modules/@stdlib/assert/is-node-writable-stream-like/test/test.js
@@ -68,7 +68,7 @@ tape( 'the function returns `true` if provided a value which is Node writable st
 	t.end();
 });
 
-tape( 'the function returns `false` if  not provided a value which is Node writable stream-like', function test( t ) {
+tape( 'the function returns `false` if not provided a value which is Node writable stream-like', function test( t ) {
 	var values;
 	var i;
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gnancount/test/test.main.js b/lib/node_modules/@stdlib/blas/ext/base/gnancount/test/test.main.js
index fa5f5de60e30..a1867046bfd4 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gnancount/test/test.main.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/gnancount/test/test.main.js
@@ -39,7 +39,7 @@ tape( 'the function has an arity of 3', function test( t ) {
 	t.end();
 });
 
-tape( 'the function counts the number of non-`NaN` elements in a  strided array', function test( t ) {
+tape( 'the function counts the number of non-`NaN` elements in a strided array', function test( t ) {
 	var x;
 	var v;
 
@@ -62,7 +62,7 @@ tape( 'the function counts the number of non-`NaN` elements in a  strided array'
 	t.end();
 });
 
-tape( 'the function counts the number of non-`NaN` elements in a  strided array (accessors)', function test( t ) {
+tape( 'the function counts the number of non-`NaN` elements in a strided array (accessors)', function test( t ) {
 	var x;
 	var v;
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/lib/main.js
index 7b76e680c5dc..e78c616ef2b4 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/lib/main.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/lib/main.js
@@ -25,7 +25,7 @@ var numelDimension = require( '@stdlib/ndarray/base/numel-dimension' );
 var getStride = require( '@stdlib/ndarray/base/stride' );
 var getOffset = require( '@stdlib/ndarray/base/offset' );
 var getData = require( '@stdlib/ndarray/base/data-buffer' );
-var clipIndex = require( '@stdlib/ndarray/base/clip-index' );
+var clipUpperIndex = require( '@stdlib/ndarray/base/clip-upper-index' );
 var strided = require( '@stdlib/blas/ext/base/dlast-index-equal' ).ndarray;
 
 
@@ -72,9 +72,9 @@ function dlastIndexEqual( arrays ) {
 	fromIndex = ndarraylike2scalar( arrays[ 2 ] );
 
 	N = numelDimension( x, 0 );
-	fromIndex = clipIndex( fromIndex, N );
-	if ( fromIndex >= N ) {
-		fromIndex = N - 1;
+	fromIndex = clipUpperIndex( fromIndex, ( fromIndex < 0 ) ? N : N-1 );
+	if ( fromIndex < 0 ) {
+		return -1;
 	}
 	return strided( fromIndex+1, getData( x ), getStride( x, 0 ), getOffset( x ), getData( y ), getStride( y, 0 ), getOffset( y ) ); // eslint-disable-line max-len
 }
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/test/test.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/test/test.js
index d1a5261eb754..268b7ac0853a 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/test/test.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/test/test.js
@@ -345,7 +345,7 @@ tape( 'the function supports a negative starting search index', function test( t
 		'dtype': 'generic'
 	});
 	actual = dlastIndexEqual( [ x, y, fromIndex ] );
-	t.strictEqual( actual, 0, 'returns expected value' );
+	t.strictEqual( actual, -1, 'returns expected value' );
 
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-of-truthy/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-of-truthy/lib/main.js
index f5b6251c3d5f..9b4e1f203603 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-of-truthy/lib/main.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-of-truthy/lib/main.js
@@ -25,7 +25,7 @@ var numelDimension = require( '@stdlib/ndarray/base/numel-dimension' );
 var getStride = require( '@stdlib/ndarray/base/stride' );
 var getOffset = require( '@stdlib/ndarray/base/offset' );
 var getData = require( '@stdlib/ndarray/base/data-buffer' );
-var clipIndex = require( '@stdlib/ndarray/base/clip-index' );
+var clipUpperIndex = require( '@stdlib/ndarray/base/clip-upper-index' );
 var strided = require( '@stdlib/blas/ext/base/dlast-index-of-truthy' ).ndarray;
 
 
@@ -66,9 +66,9 @@ function dlastIndexOfTruthy( arrays ) {
 	fromIndex = ndarraylike2scalar( arrays[ 1 ] );
 
 	N = numelDimension( x, 0 );
-	fromIndex = clipIndex( fromIndex, N );
-	if ( fromIndex >= N ) {
-		fromIndex = N - 1;
+	fromIndex = clipUpperIndex( fromIndex, ( fromIndex < 0 ) ? N : N-1 );
+	if ( fromIndex < 0 ) {
+		return -1;
 	}
 	return strided( fromIndex+1, getData( x ), getStride( x, 0 ), getOffset( x ) );
 }
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-of-truthy/test/test.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-of-truthy/test/test.js
index bf4417311fc8..f8e0a07ebc55 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-of-truthy/test/test.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-of-truthy/test/test.js
@@ -170,7 +170,7 @@ tape( 'the function supports a `fromIndex` parameter (negative)', function test(
 		'dtype': 'generic'
 	});
 	actual = dlastIndexOfTruthy( [ x, fromIndex ] );
-	t.strictEqual( actual, 0, 'returns expected value' );
+	t.strictEqual( actual, -1, 'returns expected value' );
 
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/iter/filter-map/test/test.js b/lib/node_modules/@stdlib/iter/filter-map/test/test.js
index b6b952443142..6f881a589f6c 100644
--- a/lib/node_modules/@stdlib/iter/filter-map/test/test.js
+++ b/lib/node_modules/@stdlib/iter/filter-map/test/test.js
@@ -155,7 +155,7 @@ tape( 'the function returns an iterator protocol-compliant object which filters
 	}
 });
 
-tape( 'the function returns an iterator protocol-compliant object which filters  and maps iterated values according to a callback function (none succeed)', function test( t ) {
+tape( 'the function returns an iterator protocol-compliant object which filters and maps iterated values according to a callback function (none succeed)', function test( t ) {
 	var expected;
 	var actual;
 	var values;
diff --git a/lib/node_modules/@stdlib/random/base/chi/test/test.factory.js b/lib/node_modules/@stdlib/random/base/chi/test/test.factory.js
index 34ab375dfe89..fe651307298a 100644
--- a/lib/node_modules/@stdlib/random/base/chi/test/test.factory.js
+++ b/lib/node_modules/@stdlib/random/base/chi/test/test.factory.js
@@ -108,7 +108,7 @@ tape( 'the function throws an error if degrees of freedom `k` is not a positive
 	}
 });
 
-tape( 'the function throws an error if  provided an options argument which is not an object (no other arguments)', function test( t ) {
+tape( 'the function throws an error if provided an options argument which is not an object (no other arguments)', function test( t ) {
 	var values;
 	var i;
 
diff --git a/lib/node_modules/@stdlib/random/base/chisquare/test/test.factory.js b/lib/node_modules/@stdlib/random/base/chisquare/test/test.factory.js
index 08e7ac60109f..780fb0ccd82a 100644
--- a/lib/node_modules/@stdlib/random/base/chisquare/test/test.factory.js
+++ b/lib/node_modules/@stdlib/random/base/chisquare/test/test.factory.js
@@ -108,7 +108,7 @@ tape( 'the function throws an error if degrees of freedom `k` is not a positive
 	}
 });
 
-tape( 'the function throws an error if  provided an options argument which is not an object (no other arguments)', function test( t ) {
+tape( 'the function throws an error if provided an options argument which is not an object (no other arguments)', function test( t ) {
 	var values;
 	var i;
 
diff --git a/lib/node_modules/@stdlib/stats/array/mskrange/test/test.js b/lib/node_modules/@stdlib/stats/array/mskrange/test/test.js
index a4d448329fd9..b5dedd48b1ba 100644
--- a/lib/node_modules/@stdlib/stats/array/mskrange/test/test.js
+++ b/lib/node_modules/@stdlib/stats/array/mskrange/test/test.js
@@ -314,13 +314,13 @@ tape( 'if provided an empty array, the function returns `NaN` (accessors)', func
 	t.end();
 });
 
-tape( 'if provided an array containing a single element, the function returns  `0`', function test( t ) {
+tape( 'if provided an array containing a single element, the function returns `0`', function test( t ) {
 	var v = mskrange( [ 1.0 ], [ 0 ] );
 	t.strictEqual( v, 0.0, 'returns expected value' );
 	t.end();
 });
 
-tape( 'if provided an array containing a single element, the function returns  `0` (accessors)', function test( t ) {
+tape( 'if provided an array containing a single element, the function returns `0` (accessors)', function test( t ) {
 	var v = mskrange( toAccessorArray( [ 1.0 ] ), toAccessorArray( [ 0 ] ) );
 	t.strictEqual( v, 0.0, 'returns expected value' );
 	t.end();
diff --git a/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/test/test.quantile.js b/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/test/test.quantile.js
index cf37ead92bd4..85f1642d5672 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/test/test.quantile.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/test/test.quantile.js
@@ -85,7 +85,7 @@ tape( 'if provided a negative `alpha`, the function returns `NaN`', function tes
 	t.end();
 });
 
-tape( 'if provided a nonpositive`beta`, the function returns `NaN`', function test( t ) {
+tape( 'if provided a nonpositive `beta`, the function returns `NaN`', function test( t ) {
 	var y;
 
 	y = quantile( 2.0, 2.0, 0.0 );
@@ -112,7 +112,7 @@ tape( 'if provided a nonpositive`beta`, the function returns `NaN`', function te
 	t.end();
 });
 
-tape( 'if provided `alpha` equal to `0.0`, the function returns `0.0` for  a valid `p`', function test( t ) {
+tape( 'if provided `alpha` equal to `0.0`, the function returns `0.0` for a valid `p`', function test( t ) {
 	var y = quantile( 0.2, 0.0, 2.0 );
 	t.strictEqual( y, 0.0, 'returns expected value' );
 	y = quantile( 0.9, 0.0, 2.0 );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/weibull/logpdf/test/test.factory.js b/lib/node_modules/@stdlib/stats/base/dists/weibull/logpdf/test/test.factory.js
index dd544ea93c7a..3a04bb3a42b8 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/weibull/logpdf/test/test.factory.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/weibull/logpdf/test/test.factory.js
@@ -188,7 +188,7 @@ tape( 'if provided a positive `lambda` and `k` equal to one, the created functio
 	t.end();
 });
 
-tape( 'if provided a positive `lambda` and `k` not equal to one, the  created function returns `-infinity` for `x=0`', function test( t ) {
+tape( 'if provided a positive `lambda` and `k` not equal to one, the created function returns `-infinity` for `x=0`', function test( t ) {
 	var logpdf;
 	var y;
 
diff --git a/lib/node_modules/@stdlib/stats/base/dists/weibull/pdf/test/test.factory.js b/lib/node_modules/@stdlib/stats/base/dists/weibull/pdf/test/test.factory.js
index b43f49a2f433..402e1172ab57 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/weibull/pdf/test/test.factory.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/weibull/pdf/test/test.factory.js
@@ -186,7 +186,7 @@ tape( 'if provided a positive `lambda` and `k` equal to one, the created functio
 	t.end();
 });
 
-tape( 'if provided a positive `lambda` and `k` not equal to one, the  created function returns `0` for `x=0`', function test( t ) {
+tape( 'if provided a positive `lambda` and `k` not equal to one, the created function returns `0` for `x=0`', function test( t ) {
 	var pdf;
 	var y;
 
diff --git a/lib/node_modules/@stdlib/stats/ranks/test/test.js b/lib/node_modules/@stdlib/stats/ranks/test/test.js
index 4b71e382651f..aebf0e7bfbac 100644
--- a/lib/node_modules/@stdlib/stats/ranks/test/test.js
+++ b/lib/node_modules/@stdlib/stats/ranks/test/test.js
@@ -178,7 +178,7 @@ tape( 'the function calculates the ranks for an array with tied values (putting
 	t.end();
 });
 
-tape( 'the function calculates the ranks for an array with tied values (putting missing  values last)', function test( t ) {
+tape( 'the function calculates the ranks for an array with tied values (putting missing values last)', function test( t ) {
 	var expected;
 	var actual;
 	var data;