Correct spelling errors in scenario_20_training1 and the science data…

…base (daid#2152)

scripts/scenario_20_training1.lua

@@ -1,11 +1,11 @@
 -- Name: Training: Cruiser
 -- Type: Basic
--- Description: Basic Training Cource
+-- Description: Basic Training Course
 ---
 --- Objective: Destroy all enemy ships in the area.
 ---
 --- Description:
---- During this training your will learn to coordinate the actions of your crew and destoy an Exuari training ground.
+--- During this training you will learn to coordinate the actions of your crew and destroy an Exuari training ground.
 ---
 --- Your ship is a Phobos light cruiser - the most common vessel in the navy.
 ---
@@ -78,9 +78,9 @@ function commsInstr()
         instr1 = true
         command:sendCommsMessage(player, _("goal-incCall", [[This is Commander Saberhagen.
 
-In this training mission you will practice the basic controls of a Phobos light cruiser.
+In this training mission, you will practice the basic controls of a Phobos light cruiser.
 Since this is not a tutorial, you will be on your own to decide how to destroy all enemy targets in an Exuari training ground.
-There will be not much resistance, so you can try different approaches and tactics savely.
+There will be not much resistance, so you can try different approaches and tactics safely.
 
 Here's your chance to beat up some helpless opponents.
 Commander Saberhagen out.]]))
@@ -119,7 +119,7 @@ function update(delta)
             table.remove(enemyList, i)
         -- Note: table.remove() inside iteration causes the next element to be skipped.
         -- This means in each update-cycle max half of the elements are removed.
-        -- It does not matter here, since update is called regulary.
+        -- It does not matter here, since update is called regularly.
         end
     end
     if #enemyList == 0 then

scripts/science_db.lua

@@ -11,7 +11,7 @@ space_objects:setLongDescription(_([[This database covers naturally occurring ph
 While ship captains are encouraged to avoid unnecessary interactions with these phenomena, knowing their properties can offer an advantage in conflicts near them.]]))
 
 item = space_objects:addEntry(_('Asteroid'))
-item:setLongDescription(_([[An asteroid is a minor planet, usually smaller than a few kilometers. Larger variants are sometimes refered to as planetoids.]]))
+item:setLongDescription(_([[An asteroid is a minor planet, usually smaller than a few kilometers. Larger variants are sometimes referred to as planetoids.]]))
 
 item = space_objects:addEntry(_('Black hole'))
 item:setLongDescription(_([[A black hole is a point of supercondensed mass with a gravitational pull so powerful that not even light can escape it. It has no locally detectable features, and can only be seen indirectly by blocking the view and distorting its surroundings, creating a strange circular mirror image of the galaxy. The black disc in the middle marks the event horizon, the boundary where even light can't escape it anymore.