Update code style and apply fixes

Author: Planeshifter

lib/node_modules/@stdlib/nlp/porter-stemmer/README.md

@@ -20,7 +20,7 @@ limitations under the License.
 
 # porterStemmer
 
-> Extracts the stem of a given word.
+> Extract the stem of a given word.
 
 <section class="intro">
 

lib/node_modules/@stdlib/nlp/porter-stemmer/docs/repl.txt

@@ -16,13 +16,10 @@
     --------
     > var out = {{alias}}( 'walking' )
     'walk'
-
     > out = {{alias}}( 'walked' )
     'walk'
-
     > out = {{alias}}( 'walks' )
     'walk'
-
     > out = {{alias}}( '' )
     ''
 

lib/node_modules/@stdlib/nlp/porter-stemmer/docs/types/test.ts

@@ -26,7 +26,7 @@ import porterStemmer = require( './index' );
 	porterStemmer( 'worldwide' ); // $ExpectType string
 }
 
-// The function does not compile if not provided a string...
+// The compiler throws an error if the function is not provided a string...
 {
 	porterStemmer( true ); // $ExpectError
 	porterStemmer( false ); // $ExpectError
@@ -36,7 +36,7 @@ import porterStemmer = require( './index' );
 	porterStemmer( ( x: number ): number => x ); // $ExpectError
 }
 
-// The function does not compile if provided insufficient arguments...
+// The compiler throws an error if the function is provided insufficient arguments...
 {
 	porterStemmer(); // $ExpectError
 }

lib/node_modules/@stdlib/nlp/porter-stemmer/lib/main.js

@@ -33,6 +33,7 @@
 var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
 var endsWith = require( '@stdlib/string/ends-with' );
 var lowercase = require( '@stdlib/string/lowercase' );
+var replace = require( '@stdlib/string/replace' );
 
 
 // VARIABLES //
@@ -141,42 +142,38 @@ function porterStemmer( word ) {
 	if ( !isString( word ) ) {
 		throw new TypeError( 'invalid argument. First argument must be a string primitive. Value: `' + word + '`.' );
 	}
-	if ( word.length < 3) {
+	if ( word.length < 3 ) {
 		return word;
 	}
 	word = lowercase( word );
-	firstch = word.substr( 0, 1 );
+	firstch = word[ 0 ];
 	if ( firstch === 'y' ) {
 		word = firstch.toUpperCase() + word.substr( 1 );
 	}
 
 	// Step 1a:
 	if ( RE_STEP1A.test( word ) ) {
-		word = word.replace( RE_STEP1A, '$1$2' );
-	}
-	else if ( RE2_STEP1A.test( word ) ) {
-		word = word.replace( RE2_STEP1A, '$1$2' );
+		word = replace( word, RE_STEP1A, '$1$2' );
+	} else if ( RE2_STEP1A.test( word ) ) {
+		word = replace( word, RE2_STEP1A, '$1$2' );
 	}
 
 	// Step 1b:
 	if ( RE_STEP1B.test( word ) ) {
 		fp = RE_STEP1B.exec( word );
 		if ( RE_MGR0.test( fp[ 1 ] ) ) {
-			word = word.replace( RE_LAST, '' );
+			word = replace( word, RE_LAST, '' );
 		}
-	}
-	else if ( RE2_STEP1B.test( word ) ) {
+	} else if ( RE2_STEP1B.test( word ) ) {
 		fp = RE2_STEP1B.exec( word );
 		stem = fp[ 1 ];
 		if ( RE_SV.test( stem ) ) {
 			word = stem;
 			if ( RE_ATBLIZ.test( word ) ) {
 				word += 'e';
-			}
-			else if ( RE_DOUBLE.test( word ) ) {
-				word = word.replace( RE_LAST, '' );
-			}
-			else if ( RE_CV.test( word ) ) {
+			} else if ( RE_DOUBLE.test( word ) ) {
+				word = replace( word, RE_LAST, '' );
+			} else if ( RE_CV.test( word ) ) {
 				word += 'e';
 			}
 		}
@@ -238,7 +235,7 @@ function porterStemmer( word ) {
 		}
 	}
 	if ( endsWith( word, 'll' ) && RE_MGR1.test( word ) ) {
-		word = word.replace( RE_LAST, '' );
+		word = replace( word, RE_LAST, '' );
 	}
 
 	// Turn initial Y back to y:

lib/node_modules/@stdlib/nlp/porter-stemmer/test/test.js

@@ -49,7 +49,7 @@ tape( 'if the first argument is not a string primitive, the function throws an e
 		5,
 		null,
 		true,
-		undefined,
+		void 0,
 		NaN,
 		[],
 		{},
@@ -76,12 +76,12 @@ tape( 'the function stems an input string using the Porter stemming algorithm',
 	for ( i = 0; i < words.original.length; i++ ) {
 		expected = words.stemmed[ i ];
 		actual = porterStemmer( words.original[ i ] );
-		t.deepEqual( actual, expected, 'returns the expected string' );
+		t.equal( actual, expected, 'returns the expected string' );
 	}
 	t.end();
 });
 
-tape( 'the function returns an emptry string if provided an empty string', function test( t ) {
+tape( 'the function returns an empty string if provided an empty string', function test( t ) {
 	var out = porterStemmer( '' );
 	t.equal( isEmptyString( out ), true, 'returns an empty string' );
 	t.end();