8026832: Clean up straggling doclint warnings in java.math

Summary: Fix empty paragraph tag warnings.
Reviewed-by: lancea

src/share/classes/java/math/BigDecimal.java

@@ -727,36 +727,27 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
      * <dl>
      * <dt><i>BigDecimalString:</i>
      * <dd><i>Sign<sub>opt</sub> Significand Exponent<sub>opt</sub></i>
-     * <p>
      * <dt><i>Sign:</i>
      * <dd>{@code +}
      * <dd>{@code -}
-     * <p>
      * <dt><i>Significand:</i>
      * <dd><i>IntegerPart</i> {@code .} <i>FractionPart<sub>opt</sub></i>
      * <dd>{@code .} <i>FractionPart</i>
      * <dd><i>IntegerPart</i>
-     * <p>
      * <dt><i>IntegerPart:</i>
      * <dd><i>Digits</i>
-     * <p>
      * <dt><i>FractionPart:</i>
      * <dd><i>Digits</i>
-     * <p>
      * <dt><i>Exponent:</i>
      * <dd><i>ExponentIndicator SignedInteger</i>
-     * <p>
      * <dt><i>ExponentIndicator:</i>
      * <dd>{@code e}
      * <dd>{@code E}
-     * <p>
      * <dt><i>SignedInteger:</i>
      * <dd><i>Sign<sub>opt</sub> Digits</i>
-     * <p>
      * <dt><i>Digits:</i>
      * <dd><i>Digit</i>
      * <dd><i>Digits Digit</i>
-     * <p>
      * <dt><i>Digit:</i>
      * <dd>any character for which {@link Character#isDigit}
      * returns {@code true}, including 0, 1, 2 ...

src/share/classes/java/math/RoundingMode.java

@@ -51,7 +51,6 @@ package java.math;
  * proper {@code MathContext}.  A summary table showing the results
  * of these rounding operations for all rounding modes appears below.
  *
- *<p>
  *<table border>
  * <caption><b>Summary of Rounding Operations Under Different Rounding Modes</b></caption>
  * <tr><th></th><th colspan=8>Result of rounding input to one digit with the given