docs: update examples and fix whitespace

lib/node_modules/@stdlib/math/base/special/logf/README.md

@@ -20,7 +20,7 @@ limitations under the License.
 
 # Logarithm
 
-> Compute the base `b` [logarithm][logarithm] of a single-precision floating-point number..
+> Compute the base `b` [logarithm][logarithm] of a single-precision floating-point number.
 
 <section class="usage">
 
@@ -66,17 +66,16 @@ v = logf( 2.0, -4.0 );
 <!-- eslint no-undef: "error" -->
 
 ```javascript
-var randu = require( '@stdlib/random/base/randu' );
-var roundf = require( '@stdlib/math/base/special/roundf' );
+var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
 var logf = require( '@stdlib/math/base/special/logf' );
 
 var b;
 var x;
 var i;
 
 for ( i = 0; i < 100; i++ ) {
-    x = roundf( randu() * 100.0 );
-    b = roundf( randu() * 5.0 );
+    x = discreteUniform( 0, 100 );
+    b = discreteUniform( 0, 5 );
     console.log( 'logf( %d, %d ) = %d', x, b, logf( x, b ) );
 }
 ```

lib/node_modules/@stdlib/math/base/special/logf/examples/index.js

@@ -18,16 +18,15 @@
 
 'use strict';
 
-var randu = require( '@stdlib/random/base/randu' );
-var roundf = require( '@stdlib/math/base/special/roundf' );
+var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
 var logf = require( './../lib' );
 
 var b;
 var x;
 var i;
 
 for ( i = 0; i < 100; i++ ) {
-	x = roundf( randu() * 100.0 );
-	b = roundf( randu() * 5.0 );
+	x = discreteUniform( 0, 100 );
+	b = discreteUniform( 0, 5 );
 	console.log( 'logf( %d, %d ) = %d', x, b, logf( x, b ) );
 }

lib/node_modules/@stdlib/math/base/special/logf/src/main.c

@@ -24,7 +24,7 @@
 *
 * @param x    input value
 * @param b    input value
-* @return	  output value
+* @return     output value
 *
 * @example
 * float out = stdlib_base_logf( 100.0f, 10.0f );