Removed idioms and misc. text clean-up (#2320)

* removed idioms and misc. text clean-up, Issue #2135

* removed idioms and misc. text clean-up, Issue #2135

doxygen/dox/ReferenceManual.dox

@@ -145,23 +145,19 @@ Functions with \ref ASYNC<br />
 </tr>
 </table>
 
-</td></tr>
-<tr><th>Mind the gap</th></tr>
-<tr><td>
 Follow these simple rules and stay out of trouble:
 
-\li \Bold{Handle discipline:} The HDF5 C-API is rife with handles or
+\li \Bold{Handle discipline:} The HDF5 API is rife with handles or
     identifiers, which you typically obtain by creating new HDF5 items, copying
-    items, or retrieving facets of items. \Emph{You acquire a handle, you own it!}
+    items, or retrieving facets of items. Consequently, \Bold{and most importantly}, you are 
-    (Colin Powell) In other words, you are responsible for releasing the underlying
+    responsible for releasing the underlying
     resources via the matching \Code{H5*close()} call, or deal with the consequences
     of resource leakage.
 \li \Bold{Closed means closed:} Do not pass identifiers that were previously
     \Code{H5*close()}-d to other API functions! It will generate an error.
 \li \Bold{Dynamic memory allocation:} The API contains a few functions in which the
     HDF5 library dynamically allocates memory on the caller's behalf. The caller owns
-    this memory and eventually must free it by calling H5free_memory(). (\Bold{Not}
+    this memory and eventually must free it by calling H5free_memory() and not language-explicit memory functions.
-    the `free` function \Emph{du jour}!)
 \li \Bold{Be careful with that saw:} Do not modify the underlying collection when an
     iteration is in progress!
 \li \Bold{Use of locations:} Certain API functions, typically called \Code{H5***_by_name}
@@ -169,7 +165,6 @@ Follow these simple rules and stay out of trouble:
     If the identifier fully specifies the object in question, pass \Code{'.'} (a dot)
     for the name!
 
-Break a leg!
 </td>
 </tr>
 </table>