test: add comment explaining large differences

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
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    status: passed
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    status: passed
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    status: na
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    status: na
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    status: passed
---

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/gammainc/test/test.native.js

@@ -401,6 +401,7 @@ tape( 'the function correctly evaluates the lower incomplete gamma function for
 			t.strictEqual( isSameValue( actual, PINF ), true, 'returns expected value' );
 			continue;
 		}
+		// NOTE: The difference is high because some of the expected values are very small.
 		t.strictEqual( ulpdiff( actual, expected[ i ] ) <= 1370, true, 'returns expected value within 1370 ulp' );
 	}
 	t.end();
@@ -423,6 +424,7 @@ tape( 'the function correctly evaluates the upper incomplete gamma function for
 			t.strictEqual( isSameValue( actual, PINF ), true, 'returns expected value' );
 			continue;
 		}
+		// NOTE: The difference is high because some of the expected values are very large.
 		t.strictEqual( ulpdiff( actual, expected[ i ] ) <= 658, true, 'returns expected value within 658 ulp' );
 	}
 	t.end();
@@ -445,6 +447,7 @@ tape( 'the function correctly evaluates the unregularized lower incomplete gamma
 			t.strictEqual( isSameValue( actual, PINF ), true, 'returns expected value' );
 			continue;
 		}
+		// NOTE: The difference is high because some of the expected values are very large.
 		t.strictEqual( ulpdiff( actual, expected[ i ] ) <= 534, true, 'returns expected value within 534 ulp' );
 	}
 	t.end();
@@ -467,6 +470,7 @@ tape( 'the function correctly evaluates the unregularized upper incomplete gamma
 			t.strictEqual( isSameValue( actual, PINF ), true, 'returns expected value' );
 			continue;
 		}
+		// NOTE: The difference is high because some of the expected values are very large.
 		t.strictEqual( ulpdiff( actual, expected[ i ] ) <= 969, true, 'returns expected value within 969 ulp' );
 	}
 	t.end();