add documentation for --suppress= option

cli/cmdlineparser.cpp

@@ -671,11 +671,12 @@ void CmdLineParser::PrintHelp()
               "    --rule-file=<file>   Use given rule file. For more information, see: \n"
               "                         https://sourceforge.net/projects/cppcheck/files/Articles/\n"
               "    -s, --style          Deprecated, use --enable=style\n"
-              "    --suppressions-list=<file>\n"
+              "    --suppress=<spec>    Suppress a specific warning. The format of <spec> is:\n"
-              "                         Suppress warnings listed in the file. Filename and line\n"
-              "                         are optional in the suppression file. The format of the\n"
-              "                         single line in the suppression file is:\n"
               "                         [error id]:[filename]:[line]\n"
+              "                         The [filename] and [line] are optional.\n"
+              "    --suppressions-list=<file>\n"
+              "                         Suppress warnings listed in the file. Each suppression\n"
+              "                         is in the same format as <spec> above.\n"
               "    --template '<text>'  Format the error messages. E.g.\n"
               "                         '{file}:{line},{severity},{id},{message}' or\n"
               "                         '{file}({line}):({severity}) {message}'\n"

man/cppcheck.1.xml

@@ -120,6 +120,7 @@ man(1), man(7), http://www.tldp.org/HOWTO/Man-Page/
       <arg choice="opt"><option>--rule=&lt;rule&gt;</option></arg>
       <arg choice="opt"><option>--rule-file=&lt;file&gt;</option></arg>            
       <arg choice="opt"><option>--style</option></arg>
+      <arg choice="opt"><option>--suppress=&lt;spec&gt;</option></arg>
       <arg choice="opt"><option>--suppressions-list=&lt;file&gt;</option></arg>
       <arg choice="opt"><option>--template '&lt;text&gt;'</option></arg>
       <arg choice="opt"><option>--verbose</option></arg>
@@ -303,12 +304,19 @@ Directory name is matched to all parts of the path.</para>
           <para>Deprecated, use --enable=style</para>
         </listitem>
       </varlistentry>
+      <varlistentry>
+        <term><option>--suppress=&lt;spec&gt;</option></term>
+        <listitem>
+          <para>Suppress a specific warning. The format of &lt;spec&gt; is: [error id]:[filename]:[line].
+          The [filename] and [line] are optional.
+          [filename] may contain the wildcard characters * or ?.</para>
+        </listitem>
+      </varlistentry>
       <varlistentry>
         <term><option>--suppressions-list=&lt;file&gt;</option></term>
         <listitem>
-          <para>Suppress warnings listed in the file. Filename and line are optional. The format of the single line in file is: [error id]:[filename]:[line].
+          <para>Suppress warnings listed in the file.
-          You can use --template or --xml to see the error id.
+          Each suppression is in the format of &lt;spec&gt; above.</para>
-          The filename may contain the wildcard characters * or ?.</para>
         </listitem>
       </varlistentry>
       <varlistentry>

man/manual.docbook

@@ -374,7 +374,8 @@ gui/test.cpp,16,error,mismatchAllocDealloc,Mismatching allocation and deallocati
     <title>Suppressions</title>
 
     <para>If you want to filter out certain errors you can suppress these.
-    First you need to create a suppressions file. The format is:</para>
+    The <literal>--suppress=</literal> command line option is used to specify
+    suppressions on the command line.  The format is one of:</para>
 
     <programlisting>[error id]:[filename]:[line]
 [error id]:[filename2]
@@ -389,6 +390,11 @@ gui/test.cpp,16,error,mismatchAllocDealloc,Mismatching allocation and deallocati
     * or ?, which match any sequence of characters or any single character
     respectively.</para>
 
+    <programlisting>cppcheck --suppress=memleak:file1.cpp src/</programlisting>
+
+    <para>If you have more than a couple of suppressions, create a suppressions
+    file with one line per suppression as above.</para>
+
     <para>Here is an example:</para>
 
     <programlisting>memleak:file1.cpp