some typo fixes

.gitignore

@@ -1 +1,3 @@
 .DS_Store
+
+*.xpr

en-us/course01-intro/topics/lc_reference.dita

@@ -26,7 +26,7 @@
                         title)</li>
                     <li>&lt;table> (a table)</li>
                     <li>&lt;fig> (a figure, including an optional title)</li>
-                    <li>&lt;properties> (a list of properies)</li>
+                    <li>&lt;properties> (a list of properties)</li>
                     <li>&lt;refsyn> (a syntax diagram)</li>
                 </ul></p>
     <p>Video: <xref href="https://www.youtube.com/watch?v=l2y-MbYf2a4" format="html"

en-us/course01-intro/topics/lc_topic.dita

@@ -24,10 +24,10 @@
         <lcInstruction>
             <p>A DITA topic is the basic unit of authoring and reuse. </p>
             <p>In topic-based authoring, you create a number of individual topics, each of which
-                each addresses a single idea or answers a single question. These topics can then be
-                used and reused in any order, in a number of different documents. In DITA the topics
-                are organized in <i>maps</i>, which are much like a table of contents; the map
-                allows you to specify the order and the hierarchy of the topics. </p>
+                addresses a single idea or answers a single question. These topics can then be used
+                and reused in any order, in a number of different documents. In DITA the topics are
+                organized in <i>maps</i>, which are much like a table of contents; the map allows
+                you to specify the order and the hierarchy of the topics. </p>
             <p>To make your topics reusable: </p>
             <ul id="ul_kpb_fhh_rs">
                 <li>A topic should address a single idea or answer a single question. </li>

en-us/course04-authoring_gloss_reference/topics/lc_new_glossgroup.dita

@@ -11,10 +11,10 @@
     </prolog>
     <learningContentbody>
         <lcInstruction>
-            <p>Similar to the glossary entry topic, the glossary group topic must contain a
-                single &lt;glossgroup> root element with an id attribute that contains one
-                &lt;title> element and one or more &lt;glossterm> or &lt;glossgroup> elements, each
-                with an id attribute.</p>
+            <p>Similar to the glossary entry topic, the glossary group topic must contain a single
+                &lt;glossgroup> root element with an id attribute that contains one &lt;title>
+                element and one or more &lt;glossentry> or &lt;glossgroup> elements, each with an id
+                attribute.</p>
             <note>
                 <p>This lesson covers basic use of the glossary group elements. For the full
                     specifications for each element, see the <xref

en-us/course06-reuse_basic/topics/lc_writing_reusable_topics.dita

@@ -46,7 +46,7 @@
                 <li>Do not use inline cross-references. In your version of the content, the
                     cross-reference target exists, but it might not be in the next map where your
                     content is reused. Instead, use DITA relationship tables to automatically
-                    generate links to releated topics. </li>
+                    generate links to related topics. </li>
             </ul>
             <p>To make your writing more generalized:</p>
             <ul id="ul_jpy_vlc_kw">

en-us/course07-reuse_advanced/topics/lc_conkeyrefs.dita

@@ -20,52 +20,48 @@
                 an element in another file might look like this:
                 </p><pre>&lt;ul conref="domestic_duck_warehouse.dita#domestic_warehouse/nesting_materials">
    &lt;li/>
-&lt;/ul></pre><p>This
-                conref pulls a &lt;ul> element from a warehouse topic that contains reusable
-                elements relevant to domestic ducks. </p><p>If the topic containing this conref must
-                be reusable, a hard-coded filename will be a problem. To use the reusable topic in a
-                map that discusses wild ducks, the conref needs to point to a different warehouse
-                topic file (wild_duck_warehouse.dita). </p><p>Rather than hard code the path to a
-                file, you can use the conkeyref attribute to create a content reference that uses a
-                key, rather than a filename. </p><image keyref="i_conkeyref" id="image_j4p_ysl_zx"
-                base="2016/12"/><p>The first step in using a conkeyref is to create a DITA topic
-                (domestic_duck_warehouse.dita) that contains a reusable element (including an id
+&lt;/ul></pre><p>This conref pulls a &lt;ul> element from a warehouse topic that
+                contains reusable elements relevant to domestic ducks. </p><p>If the topic
+                containing this conref must be reusable, a hard-coded filename will be a problem. To
+                use the reusable topic in a map that discusses wild ducks, the conref needs to point
+                to a different warehouse topic file (wild_duck_warehouse.dita). </p><p>Rather than
+                hard code the path to a file, you can use the conkeyref attribute to create a
+                content reference that uses a key, rather than a filename. </p><image
+                keyref="i_conkeyref" id="image_j4p_ysl_zx" base="2016/12"/><p>The first step in
+                using a conkeyref is to create a DITA topic (domestic_duck_warehouse.dita) that
+                contains a reusable element (including an id
                 attribute):</p><pre>&lt;ul id="nesting_materials">
    &lt;li>Sawdust&lt;/li>
    &lt;li>Wood shavings&lt;/li>
    &lt;li>Sand&lt;/li>
    ...
-&lt;/ul></pre><p>In
-                a map that references the topic that will use the conkeyref, define a key for the
-                warehouse file:
+&lt;/ul></pre><p>In a map that references the topic that will use the conkeyref,
+                define a key for the warehouse file:
                 </p><pre>&lt;keydef keys="duck_warehouse" href="domestic_duck_warehouse.dita"/></pre><p>The
                 example at the beginning of this topic shows a &lt;ul> element with a conref.
                 Replace the conref attribute with a conkeyref attribute that contains the key, a
                 slash ('/'), and the id of the element to be pulled:
                 </p><pre>&lt;ul conkeyref="duck_warehouse/nesting_materials">
    &lt;li/>
-&lt;/ul></pre><note>When
-                using conkeyrefs you do not need to use the id of the topic that contains the
-                referenced element. </note><p>When the topic containing the conkeyref is processed,
-                the key duck_warehouse is replaced with the current key definition, which is
-                domestic_duck_warehouse.dita. </p><p>You can reuse the topic containing the
-                conkeyref in another DITA map, but you might need it to pull content from a file
-                that is specific to the new map. To do this, add a &lt;keydef> element to the new
-                map that defines the key so that it points to a different file. In this example, the
-                new map (that addresses wild ducks) defines the duck_warehouse key to point to
-                wild_duck_warehouse.dita:
+&lt;/ul></pre><note>When using conkeyrefs you do not need to use the id of the topic
+                that contains the referenced element. </note><p>When the topic containing the
+                conkeyref is processed, the key duck_warehouse is replaced with the current key
+                definition, which is domestic_duck_warehouse.dita. </p><p>You can reuse the topic
+                containing the conkeyref in another DITA map, but you might need it to pull content
+                from a file that is specific to the new map. To do this, add a &lt;keydef> element
+                to the new map that defines the key so that it points to a different file. In this
+                example, the new map (that addresses wild ducks) defines the duck_warehouse key to
+                point to wild_duck_warehouse.dita:
                 </p><pre>&lt;keydef keys="duck_warehouse" href="wild_duck_warehouse.dita"/></pre><p>The
                 file wild_duck_warehouse.dita defines a different &lt;ul> element; however, it must
-                use the same id
-                attribute:</p><pre>&lt;ul id="nesting_materials">
+                use the same id attribute:</p><pre>&lt;ul id="nesting_materials">
    &lt;li>Ferns&lt;/li>
    &lt;li>Twigs&lt;/li>
    &lt;li>Grass&lt;/li>
    ...
-&lt;/ul></pre><p>When
-                this new key is used in the wile duck map, the unordered list of wild duck nesting
-                materials is used.</p><p>Finally, note that all the same rules that apply to conrefs
-                also apply to conkeyrefs: </p><ul id="ul_gzh_wmv_qx">
+&lt;/ul></pre><p>When this new key is used in the wild duck map, the unordered list
+                of wild duck nesting materials is used.</p><p>Finally, note that all the same rules
+                that apply to conrefs also apply to conkeyrefs: </p><ul id="ul_gzh_wmv_qx">
                 <li>The referencing element must be the same type (element name) as the referenced
                     element. </li>
                 <li>The referencing element must be valid (for instance, a &lt;ul> element must