docs: fix a couple of typos in the manual

Spotted by Alexander Saprykin.

Fixes #622379.

docs/manual/advanced-autoplugging.xml

@@ -85,7 +85,7 @@
       concept of typefinding for this. Typefinding is a normal part of a
       pipeline, it will read data for as long as the type of a stream is
       unknown. During this period, it will provide data to all plugins
-      that implement a typefinder. when one of the typefinders recognizes
+      that implement a typefinder. When one of the typefinders recognizes
       the stream, the typefind element will emit a signal and act as a
       passthrough module from that point on. If no type was found, it will
       emit an error and further media processing will stop.

docs/manual/advanced-dparams.xml

@@ -73,7 +73,7 @@
       has timestamped control-values assigned one can change the GObject
       property through <function>g_object_set()</function>.
       This is highly useful when binding the GObject properties to GUI widgets.
-      When the user adjusts the value with the widget, one can set the GOBject
+      When the user adjusts the value with the widget, one can set the GObject
       property and this remains active until the next timestamped value overrides.
       This also works with smoothed parameters.  
     </para>

docs/manual/advanced-interfaces.xml

@@ -148,7 +148,7 @@
     </note>
     <para>
       This interface is currently implemented by many elements, including
-      the ALSA, OSS, XVImageSink, Video4linux and Video4linux2 elements.
+      the ALSA, OSS, XVideo, Video4linux and Video4linux2 elements.
     </para>
   </sect1>
 

docs/manual/advanced-position.xml

@@ -18,7 +18,7 @@
     <title>Querying: getting the position or length of a stream</title>
 
     <para>
-      Querying is defined as requesting a specific stream-property related
+      Querying is defined as requesting a specific stream property related
       to progress tracking. This includes getting the length of a stream (if
       available) or getting the current position. Those stream properties
       can be retrieved in various formats such as time, audio samples, video

docs/manual/appendix-checklist.xml

@@ -105,11 +105,11 @@
        </listitem>
        <listitem>
          <para>
-          <option>--gst-debug-no-color</option> will disable color debugging
+          <option>--gst-debug-no-color</option> will disable color debugging.
           You can also set the GST_DEBUG_NO_COLOR environment variable to 1
           if you want to disable colored debug output permanently. Note that
           if you are disabling color purely to avoid messing up your pager
-          output, trying using <command>less -R</command>.
+          output, try using <command>less -R</command>.
          </para>
        </listitem>
        <listitem>

docs/manual/basics-helloworld.xml

@@ -225,11 +225,20 @@ main (int   argc,
       $(pkg-config --cflags --libs gstreamer-&GST_MAJORMINOR;)
       helloworld.c -o helloworld</command>. &GStreamer; makes use of
       <command>pkg-config</command> to get compiler and linker flags
-      needed to compile this application. If you're running a
-      non-standard installation, make sure the
-      <classname>PKG_CONFIG_PATH</classname> environment variable is
-      set to the correct location (<filename>$libdir/pkgconfig</filename>).
-      application against the uninstalled location.
+      needed to compile this application.
+    </para>
+    <para>
+      If you're running a non-standard installation (ie. you've installed
+      GStreamer from source yourself instead of using pre-built packages),
+      make sure the <classname>PKG_CONFIG_PATH</classname> environment variable
+      is set to the correct location (<filename>$libdir/pkgconfig</filename>).
+    </para>
+    <para>
+      In the unlikely case that you are using an uninstalled GStreamer
+      setup (ie. gst-uninstalled), you will need to use libtool to build the
+      hello world program, like this: <command>libtool --mode=link gcc -Wall
+      $(pkg-config --cflags --libs gstreamer-&GST_MAJORMINOR;)
+      helloworld.c -o helloworld</command>.
     </para>
     <para>
       You can run this example application with <command>./helloworld