Update release notes

Also add some examples to nix --help.

doc/manual/style.css

@@ -96,7 +96,6 @@ div.example
     margin-right: 1.5em;
     background: #f4f4f8;
     border-radius: 0.4em;
-    box-shadow: 0.4em 0.4em 0.5em #e0e0e0;
 }
 
 div.example p.title
@@ -106,7 +105,6 @@ div.example p.title
 
 div.example pre
 {
-    box-shadow: none;
 }
 
 
@@ -116,15 +114,12 @@ div.example pre
 
 pre.screen, pre.programlisting
 {
-    border: 1px solid #b0b0b0;
-    padding: 3px 3px;
+    padding: 6px 6px;
     margin-left: 1.5em;
     margin-right: 1.5em;
     color: #600000;
     background: #f4f4f8;
     font-family: monospace;
-    border-radius: 0.4em;
-    box-shadow: 0.4em 0.4em 0.5em #e0e0e0;
 }
 
 div.example pre.programlisting
@@ -149,7 +144,6 @@ div.example pre.programlisting
     padding: 0.3em 0.3em 0.3em 0.3em;
     background: #fffff5;
     border-radius: 0.4em;
-    box-shadow: 0.4em 0.4em 0.5em #e0e0e0;
 }
 
 div.note, div.warning
@@ -256,13 +250,11 @@ span.command strong
 
 div.calloutlist table
 {
-    box-shadow: none;
 }
 
 table
 {
     border-collapse: collapse;
-    box-shadow: 0.4em 0.4em 0.5em #e0e0e0;
 }
 
 div.affiliation

src/nix/ls.cc

@@ -90,6 +90,16 @@ struct CmdLsStore : StoreCommand, MixLs
         expectArg("path", &path);
     }
 
+    Examples examples() override
+    {
+        return {
+            Example{
+                "To list the contents of a store path in a binary cache:",
+                "nix ls-store --store https://cache.nixos.org/ -lR /nix/store/0i2jd68mp5g6h2sa5k9c85rb80sn8hi9-hello-2.10"
+            },
+        };
+    }
+
     std::string name() override
     {
         return "ls-store";
@@ -116,6 +126,16 @@ struct CmdLsNar : Command, MixLs
         expectArg("path", &path);
     }
 
+    Examples examples() override
+    {
+        return {
+            Example{
+                "To list a specific file in a NAR:",
+                "nix ls-nar -l hello.nar /bin/hello"
+            },
+        };
+    }
+
     std::string name() override
     {
         return "ls-nar";

src/nix/run.cc

@@ -85,6 +85,10 @@ struct CmdRun : InstallablesCommand
                 "To run GNU Hello:",
                 "nix run nixpkgs.hello -c hello --greeting 'Hi everybody!'"
             },
+            Example{
+                "To run GNU Hello in a chroot store:",
+                "nix run --store ~/my-nix nixpkgs.hello -c hello"
+            },
         };
     }