Fix some comments from #5902

std/datetime/timezone.d

@@ -1994,41 +1994,37 @@ public:
     }
 
 
-    version(TZDatabaseDir)
+    version(StdDdoc)
     {
-        import std.string : strip;
         /++
-            The default directory where the TZ Database files are. It's empty
-            for Windows, since Windows doesn't have them.
+            The default directory where the TZ Database files are stored. It's
+            empty for Windows, since Windows doesn't have them. You can also use
+            the TZDatabaseDir version to pass an arbitrary path at compile-time,
+            rather than hard-coding it here. Android concatenates all time zone
+            data into a single file called tzdata and stores it in the directory
+            below.
           +/
+        enum defaultTZDatabaseDir = "";
+    }
+    else version(TZDatabaseDir)
+    {
+        import std.string : strip;
         enum defaultTZDatabaseDir = strip(import("TZDatabaseDirFile"));
     }
     else version(Android)
     {
-        // Android concatenates all time zone data into a single file and stores it here.
         enum defaultTZDatabaseDir = "/system/usr/share/zoneinfo/";
     }
     else version(Solaris)
     {
-        /++
-            The default directory where the TZ Database files are. It's empty
-            for Windows, since Windows doesn't have them.
-          +/
         enum defaultTZDatabaseDir = "/usr/share/lib/zoneinfo/";
     }
     else version(Posix)
     {
-        /++
-            The default directory where the TZ Database files are. It's empty
-            for Windows, since Windows doesn't have them.
-          +/
         enum defaultTZDatabaseDir = "/usr/share/zoneinfo/";
     }
     else version(Windows)
     {
-        /++ The default directory where the TZ Database files are. It's empty
-            for Windows, since Windows doesn't have them.
-          +/
         enum defaultTZDatabaseDir = "";
     }
 

std/digest/murmurhash.d

@@ -505,15 +505,16 @@ struct MurmurHash3(uint size /* 32 or 128 */ , uint opt = size_t.sizeof == 8 ? 6
         // Buffer should never be full while entering this function.
         assert(bufferSize < Element.sizeof);
 
-        // Check if we don't fill up a whole block buffer.
+        // Check if the incoming data doesn't fill up a whole block buffer.
         if (bufferSize + data.length < Element.sizeof)
         {
             buffer.data[bufferSize .. bufferSize + data.length] = data[];
             bufferSize += data.length;
             return;
         }
 
-        // Check if we have some leftover data in the buffer. Then fill the first block buffer.
+        // Check if there's some leftover data in the first block buffer, and
+        // fill the remaining space first.
         if (bufferSize != 0)
         {
             const bufferLeeway = Element.sizeof - bufferSize;