chore: stuff from code review

Author: Neerajpathak07

lib/node_modules/@stdlib/stats/base/dists/erlang/kurtosis/README.md

@@ -218,8 +218,8 @@ static double random_uniform( const double min, const double max ) {
 }
 
 int main( void ) {
-    int32_t k;
     double lambda;
+    int32_t k;
     double y;
     int i;
 

lib/node_modules/@stdlib/stats/base/dists/erlang/kurtosis/examples/c/example.c

@@ -29,8 +29,8 @@ static double random_uniform( const double min, const double max ) {
 }
 
 int main( void ) {
-	int32_t k;
 	double lambda;
+	int32_t k;
 	double y;
 	int i;
 

lib/node_modules/@stdlib/stats/base/dists/erlang/kurtosis/include/stdlib/stats/base/dists/erlang/kurtosis.h

@@ -29,7 +29,7 @@ extern "C" {
 #endif
 
 /**
-* Returns the excess kurtosis for a erlang distribution with shape parameter `k` and rate parameter `lambda`.
+* Returns the excess kurtosis for an Erlang distribution with shape parameter `k` and rate parameter `lambda`.
 */
 double stdlib_base_dists_erlang_kurtosis( const int32_t k, const double lambda );
 

lib/node_modules/@stdlib/stats/base/dists/erlang/kurtosis/src/main.c

@@ -20,20 +20,21 @@
 #include "stdlib/math/base/assert/is_positive_integer.h"
 #include "stdlib/math/base/assert/is_nan.h"
 #include <stdint.h>
+
 /**
-* Returns the excess kurtosis for a erlang distribution with shape parameter `k` and rate parameter `lambda`.
+* Returns the excess kurtosis for an Erlang distribution with shape parameter `k` and rate parameter `lambda`.
 *
 * @param k         shape parameter
 * @param lambda    rate parameter
 * @return          excess kurtosis
 *
 * @example
-* double y = stdlib_base_dists_beta_kurtosis( 1.0, 1.0 );
+* double y = stdlib_base_dists_beta_kurtosis( 1, 1.0 );
 * // returns 6.0
 */
 double stdlib_base_dists_erlang_kurtosis( const int32_t k, const double lambda ) {
 	if (
-		!stdlib_base_is_positive_integer( k ) ||
+		k > 0.0 ||
 		stdlib_base_is_nan( lambda ) ||
 		lambda <= 0.0
 	) {