style: add empty lines between code generation blocks

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
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    status: na
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    status: na
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    status: na
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  - task: lint_r
    status: na
  - task: lint_c_src
    status: passed
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
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    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Planeshifter

lib/node_modules/@stdlib/math/base/special/kernel-sincos/src/main.c

@@ -38,7 +38,9 @@ static double polyval_s24( const double x ) {
 	return 0.00833333333332249 + (x * (-0.0001984126982985795 + (x * 0.0000027557313707070068)));
 }
 
-// END: polyval_s24// BEGIN: polyval_s56
+// END: polyval_s24
+
+// BEGIN: polyval_s56
 
 /**
 * Evaluates a polynomial.
@@ -56,7 +58,9 @@ static double polyval_s56( const double x ) {
 	return -2.5050760253406863e-8 + (x * 1.58969099521155e-10);
 }
 
-// END: polyval_s56// BEGIN: polyval_c13
+// END: polyval_s56
+
+// BEGIN: polyval_c13
 
 /**
 * Evaluates a polynomial.
@@ -74,7 +78,9 @@ static double polyval_c13( const double x ) {
 	return 0.0416666666666666 + (x * (-0.001388888888887411 + (x * 0.00002480158728947673)));
 }
 
-// END: polyval_c13// BEGIN: polyval_c46
+// END: polyval_c13
+
+// BEGIN: polyval_c46
 
 /**
 * Evaluates a polynomial.
@@ -95,7 +101,7 @@ static double polyval_c46( const double x ) {
 // END: polyval_c46
 
 /**
-* Simultaneously computes the sine and cosine of an angle measured in radians on the interval \\( \approx \[-\pi/4, \pi/4\] \\) (except for \\(-0\\)), where \\( \pi/4 \approx 0.7854 \\).
+* Simultaneously computes the sine and cosine of an angle measured in radians within the interval \\( \approx \[-\pi/4, \pi/4\] \\) (except for \\(-0\\)), where \\( \pi/4 \approx 0.7854 \\), and stores the results in the provided output parameters.
 *
 * @param x         input value (in radians, assumed to be bounded by `~π/4` in magnitude)
 * @param y         tail of `x`