Add some documentation on --find option

doc/index.docbook

@@ -34,7 +34,7 @@ Context menu actions like Rename Bookmarks etc.)
 			<!-- TRANS:ROLES_OF_TRANSLATORS -->
 		</authorgroup>
 		<legalnotice>&FDLNotice;</legalnotice>
-		<date>2019-01-14</date>
+		<date>2019-02-14</date>
 		<releaseinfo>1.7 (Applications 19.04)</releaseinfo>
 		<!-- Abstract about this handbook -->
 		<abstract>
@@ -966,22 +966,27 @@ Context menu actions like Rename Bookmarks etc.)
 				<term><userinput><command>okular</command>
 				<option>--print</option></userinput></term>
 				<listitem><para>Start with print dialog.</para></listitem>
-			    </varlistentry>
-                            <varlistentry>
+				</varlistentry>
+                <varlistentry>
 				<term><userinput><command>okular</command>
 				<option>--print-and-exit</option></userinput></term>
 				<listitem><para>Start with print dialog and exit after printing.</para></listitem>
-			    </varlistentry>
+				</varlistentry>
 			    <varlistentry>
 				<term><userinput><command>okular</command>
 				<option>--unique</option></userinput></term>
 				<listitem><para>Unique instance control.</para></listitem>
-			    </varlistentry>
-			    <varlistentry>
+				</varlistentry>
+				<varlistentry>
 				<term><userinput><command>okular</command>
 				<option>--noraise</option></userinput></term>
 				<listitem><para>Allows to prevent &okular; window raising after the start.</para></listitem>
-                            </varlistentry>
+				</varlistentry>
+                <varlistentry>
+				<term><userinput><command>okular</command>
+				<option>--find <replaceable>string</replaceable></option></userinput></term>
+				<listitem><para>Tries to find and highlight a given string in the document. Only works if just one document is given as an argument of the <userinput><command>okular</command></userinput> command.</para></listitem>
+				</varlistentry>
 			</variablelist>
 		    </sect2>
 		</sect1>

doc/man-okular.1.docbook

@@ -10,8 +10,8 @@
 <author><firstname>Yuri</firstname><surname>Chornoivan</surname>
 <contrib>Okular man page.</contrib>
 <email>yurchor@ukr.net</email></author>
-<date>2018-02-03</date>
-<releaseinfo>Okular 1.4</releaseinfo>
+<date>2019-02-14</date>
+<releaseinfo>Okular 1.7</releaseinfo>
 <productname>KDE Applications</productname>
 </refentryinfo>
 
@@ -78,6 +78,12 @@ is aimed to show documents in different formats.</para>
 <para>Allows to prevent Okular window raising after the start.</para>
   </listitem>
   </varlistentry>
+  <varlistentry>
+    <term><option>--find <replaceable>string</replaceable></option></term>
+  <listitem>
+<para>Find a string on the text.</para>
+  </listitem>
+  </varlistentry>
 </variablelist>
 </refsect1>