chore(Core/Misc): Some cleanup (#19970)

* remove weird blanks

* update if

* ) ) to ))

* missed some ) )

* now switch

* .

src/server/game/Movement/Spline/Spline.cpp

@@ -301,5 +301,4 @@ namespace Movement
 
         return str.str();
     }
-
 }

src/server/game/Movement/Spline/Spline.h

@@ -205,7 +205,6 @@ namespace Movement
         void set_length(index_type i, length_type length) { lengths[i] = length;}
         void clear();
     };
-
 }
 
 #include "SplineImpl.h"

src/server/game/Movement/Spline/SplineImpl.h

@@ -92,5 +92,4 @@ namespace Movement
         SplineBase::clear();
         lengths.clear();
     }
-
 }