BCMath\Number::powmod: remove whitespaces between tags (#4418)

* remove extra space

* keep classname in the same line to avoid space in compilation

Author: leonardolara

reference/bc/bcmath/number/divmod.xml

@@ -23,9 +23,9 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <simpara>
-   Returns an indexed <type>array</type> where the first element is the quotient as a new <classname>
-   BcMath\Number</classname> object and the second element is the remainder as a new <classname>
-   BcMath\Number</classname> object.
+   Returns an indexed <type>array</type> where the first element is the quotient as a new
+   <classname>BcMath\Number</classname> object and the second element is the remainder as a new
+   <classname>BcMath\Number</classname> object.
   </simpara>
   <simpara>
    The quotient is always an integer value, so <property>BcMath\Number::scale</property> of the quotient will

reference/bc/bcmath/number/powmod.xml

@@ -15,7 +15,7 @@
   </methodsynopsis>
   <simpara>
    Use the fast-exponentiation method to raise <varname>$this</varname> to the power
-   <parameter>exponent</parameter> with respect to the modulus <parameter> modulus</parameter>.
+   <parameter>exponent</parameter> with respect to the modulus <parameter>modulus</parameter>.
   </simpara>
  </refsect1>