Doc, releasnotes 5.6 and some doc fixes

bcomp/wbl/bcomp/src/basecomponent.wb_load

@@ -173659,7 +173659,7 @@ OA2 = A4 + (OA1 - 5) / 90 * (A3 - A4);"
     !  The positioner calculates an output from the current position and  
     !  a desired set position. When the distance to the set position is larger
     !  than a break distance, the maximum output is set as output. When the distance
-    !  is less than the break distance the output is proportional to the squareroot
+    !  is less than the break distance the output is proportional to the square root
     !  of the distance. When the distance enters the dead zone, the unit is 
     !  considered to be in position. The positioning continues beyond that for a period
     !  of time, InPosTime, before it is stopped. It can also be stopped  from the program 
@@ -173675,7 +173675,7 @@ OA2 = A4 + (OA1 - 5) / 90 * (A3 - A4);"
     !
     !  In Manual mode, the object is controlled from the object graph. The set position
     !  can be entered in the Set field, and start/stop is controlled from the Start and 
-    !  Stopp buttons.
+    !  Stop buttons.
     !
     !  @b Object graph
     !  @image orm_compposit_og.png

src/doc/man/en_us/man_dg.dat

@@ -8475,7 +8475,7 @@ Revisions
 A revision is a state in the development environment that is stored in a version control 
 system. The revision should include all source files to make it possible to restore a revision.
 A revision can be used to review the state when the revision was created, and also to build 
-runable systems from the restored source to test or run aa restore revision in production.
+runable systems from the restored source to test or run a restored revision in production.
 
 The currently supported version control system is Git. A new repository will be created on 
 $pwrp_root/src when the first revision is created.
@@ -8486,7 +8486,7 @@ configurator.
 
 <h1>Create a revision
 A new revision is created from Functions/New Revison in the menu. New revisions can only be
-created if the currently checkedout revision is the end point of a branch.
+created if the currently checked out revision is the end point of a branch.
 
 <image>dg_fig124.png
 <b>Fig Create a new revision
@@ -8505,7 +8505,7 @@ Also in the configurator title bar, the current revision is written.
 <b>Fig An old revision is restored
 
 <h1>Create a branch
-If on old revision in the main line is restored, a branch can be created by creating a new
+If an old revision in the main line is restored, a branch can be created by creating a new
 revision from this point. In the figure above, a branch has be created from revision V2.0.1.
 New revisions can also be created from the end point of the branch. In the figure above, a 
 new revision can be created from V2.0.1-2 that is an end point, but not from V2.0.1-1.