Fix misc. grammar and whitespace

src/Base/Factory.h

@@ -49,8 +49,8 @@ public:
 
 
 /** Base class of all factories
-  * This class has the purpose to produce at runtime instances
-  * of classes not known at compile time. It holds a map of so called
+  * This class has the purpose to produce a runtime instance
+  * of classes unknown at compile time. It holds a map of so called
   * producers which are able to produce an instance of a special class.
   * Producer can be registered at runtime through e.g. application modules
   */

src/Mod/AddonManager/addonmanager_utilities.py

@@ -143,7 +143,7 @@ def remove_directory_if_empty(dir_to_remove):
 
 def restart_freecad():
     """Shuts down and restarts FreeCAD"""
-    
+
     if not QtCore or not QtWidgets:
         return
 

src/Mod/Fem/femexamples/equation_magnetodynamics_2D_elmer.py

@@ -184,7 +184,7 @@ def setup(doc=None, solvertype="elmer"):
         equation_magnetodynamic2D.IsHarmonic = True
     else:
         FreeCAD.Console.PrintWarning(
-            "Not known or not supported solver type: {}. "
+            "Unknown or unsupported solver type: {}. "
             "No solver object was created.\n".format(solvertype)
         )
         return doc

src/Mod/Fem/femexamples/equation_magnetostatics_2D_elmer.py

@@ -180,7 +180,7 @@ def setup(doc=None, solvertype="elmer"):
         equation_magnetodynamic2D.CalculateMagneticFieldStrength = True
     else:
         FreeCAD.Console.PrintWarning(
-            "Not known or not supported solver type: {}. "
+            "Unknown or unsupported solver type: {}. "
             "No solver object was created.\n".format(solvertype)
         )
         return doc