fix(object_based_programming_techniques.md): correct typos

A correction based on Beliavsky's reading.[1]

[1] #526

Signed-off-by: Norwid Behrnd <[email protected]>

Author: nbehrnd

source/learn/oop_features_in_fortran/object_based_programming_techniques.md

@@ -151,9 +151,9 @@ to be aware of:
 1. If all type components have the `private` attribute i.e., the type
    is **opaque** (not a Fortran term), it can only be used if the type
    declaration is accessed by host association (this is the same as for
-   nonallocatable/nonpointer components);
-2. especially for container-like types, its semantics may be
-   incompatible with the programmers intentions for how the objects
+   nonallocatable/nonpointer components).
+2. Especially for container-like types, its semantics may be
+   incompatible with the programmer's intentions for how the objects
    should be used.
 
 Item 2 is illustrated by the above object setups, specifically:
@@ -479,7 +479,7 @@ case of polymorphic objects.
 ### Implementing move semantics
 
 Sometimes it may be necessary to make use of move instead of copy
-semantics i.e., create a copy of an object and then getting rid of the
+semantics i.e., create a copy of an object and then get rid of the
 original. The simplest way of doing this is to make use of allocatable
 (scalar or array) objects,