Misc. typos

- Tooltip uniformity 
- source comment typo fixes
- remove double whitespaces

src/Gui/Document.cpp

@@ -1161,7 +1161,7 @@ void Document::detachView(Gui::BaseView* pcView, bool bPassiv)
                 it = d->passiveViews.begin();
             }
 
-            // is already  closing the document
+            // is already closing the document
             if (d->_isClosing == false)
                 d->_pcAppWnd->onLastWindowClosed(this);
         }

src/Gui/Document.h

@@ -236,9 +236,9 @@ public:
     std::vector<std::string> getUndoVector(void) const;
     /// Get an Redo string vector with the Redo names
     std::vector<std::string> getRedoVector(void) const;
-    /// Will UNDO  one or more steps
+    /// Will UNDO one or more steps
     void undo(int iSteps);
-    /// Will REDO  one or more steps
+    /// Will REDO one or more steps
     void redo(int iSteps) ;
     //@}
 

src/Gui/GestureNavigationStyle.cpp

@@ -272,7 +272,7 @@ SbBool GestureNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     //----------all this were preparations. Now comes the event handling! ----------
 
-    SbBool processed = false;//a return value for the  BlahblahblahNavigationStyle::processSoEvent
+    SbBool processed = false;//a return value for the BlahblahblahNavigationStyle::processSoEvent
     bool propagated = false;//an internal flag indicating that the event has been already passed to inherited, to suppress the automatic doing of this at the end.
     //goto finalize = return processed. Might be important to do something before done (none now).
 

src/Gui/Splashscreen.h

@@ -31,7 +31,7 @@ namespace Gui {
 
 class SplashObserver;
 
-/** This widget provides a splash screen that can be shown  during application startup.
+/** This widget provides a splash screen that can be shown during application startup.
  *
  * \author Werner Mayer
  */

src/Gui/ViewProvider.cpp

@@ -532,7 +532,7 @@ SoPickedPoint* ViewProvider::getPointOnRay(const SbVec2s& pos, const View3DInven
 
 SoPickedPoint* ViewProvider::getPointOnRay(const SbVec3f& pos,const SbVec3f& dir, const View3DInventorViewer* viewer) const
 {
-    // Note: There seems to be a  bug with setRay() which causes SoRayPickAction
+    // Note: There seems to be a bug with setRay() which causes SoRayPickAction
     // to fail to get intersections between the ray and a line
     
     //first get the path to this node and calculate the current setTransformation

src/Gui/WaitCursor.h

@@ -29,7 +29,7 @@
 namespace Gui {
 
 /**
- * This class sets a waitcursor automatically while a  slow operation is running. 
+ * This class sets a waitcursor automatically while a slow operation is running. 
  * Therefore you just have to create an instance of WaitCursor before the time 
  * consuming operation starts.
  *

src/Gui/lex.SelectionFilter.c

@@ -33,7 +33,7 @@
 #define FLEX_BETA
 #endif
 
-/* First, we deal with  platform-specific or compiler-specific issues. */
+/* First, we deal with platform-specific or compiler-specific issues. */
 
 /* begin standard C headers. */
 #include <stdio.h>
@@ -622,7 +622,7 @@ static int input (void );
 #define ECHO do { if (fwrite( SelectionFiltertext, SelectionFilterleng, 1, SelectionFilterout )) {} } while (0)
 #endif
 
-/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
+/* Gets input and stuffs it into "buf". Number of characters read, or YY_NULL,
  * is returned in "result".
  */
 #ifndef YY_INPUT
@@ -1639,10 +1639,10 @@ static void yy_fatal_error (yyconst char* msg )
 		} \
 	while ( 0 )
 
-/* Accessor  methods (get/set functions) to struct members. */
+/* Accessor methods (get/set functions) to struct members. */
 
 /** Get the current line number.
- * 
+ *
  */
 int SelectionFilterget_lineno  (void)
 {