Fix typos

src/App/DocumentObserver.h

@@ -454,7 +454,7 @@ private:
 };
 
 /**
- * The DocumentObserver class simplfies the step to write classes that listen
+ * The DocumentObserver class simplifies the step to write classes that listen
  * to what happens inside a document.
  * This is very useful for classes that needs to be notified when an observed
  * object has changed.

src/App/Metadata.h

@@ -219,7 +219,7 @@ public:
     //////////////////////////////////////////////////////////////
 
     std::string name() const;     //< A short name for this package, often used as a menu entry.
-    Meta::Version version() const;//< Version string in symantic triplet format, e.g. "1.2.3".
+    Meta::Version version() const;//< Version string in semantic triplet format, e.g. "1.2.3".
     std::string date()
         const;//< Date string -- currently arbitrary (when C++20 is well-supported we can revisit)
     std::string description() const;//< Text-only description of the package. No markup.
@@ -342,7 +342,7 @@ public:
 
     /**
         * Determine whether the current metadata specifies support for the currently-running version of FreeCAD.
-        * Does not interrogate content items, which must be querried individually.
+        * Does not interrogate content items, which must be queried individually.
         */
     bool supportsCurrentFreeCAD() const;
 

src/Gui/ViewProviderPy.xml

@@ -256,7 +256,7 @@ view: View3DInventorPy\n    Default to active view. Optional.</UserDocu>
     </Attribute>
     <Attribute Name="DropPrefix" ReadOnly="true" >
       <Documentation>
-          <UserDocu>Subname referecing the sub-object for holding dropped object.</UserDocu>
+          <UserDocu>Subname referencing the sub-object for holding dropped object.</UserDocu>
       </Documentation>
       <Parameter Name="DropPrefix" Type="String" />
     </Attribute>

src/Mod/Arch/ArchStructure.py

@@ -1009,7 +1009,7 @@ class _Structure(ArchComponent.Component):
 
     def getNodeEdges(self,obj):
 
-        "returns a list of edges from stuctural nodes"
+        "returns a list of edges from structural nodes"
 
         edges = []
         if obj.Nodes:

src/Mod/OpenSCAD/InitGui.py

@@ -92,7 +92,7 @@ class OpenSCADWorkbench(Workbench):
             import OpenSCADUtils
 
             openscadfilename = OpenSCADUtils.searchforopenscadexe()
-            if openscadfilename:  # automatic search was succsessful
+            if openscadfilename:  # automatic search was successful
                 FreeCAD.addImportType("OpenSCAD Format (*.scad)", "importCSG")
                 param.SetString(
                     "openscadexecutable", openscadfilename