Fix various trailing newlines, typos and grammar

src/Mod/AddonManager/addonmanager_installer.py

@@ -52,7 +52,7 @@ translate = FreeCAD.Qt.translate
 class InstallationMethod(IntEnum):
     """For packages installed from a git repository, in most cases it is possible to either use git
     or to download a zip archive of the addon. For a local repository, a direct copy may be used
-    instead. If "ANY" is given, the the internal code decides which to use."""
+    instead. If "ANY" is given, the internal code decides which to use."""
 
     GIT = auto()
     COPY = auto()

src/Mod/Fem/femsolver/elmer/writer.py

@@ -1263,7 +1263,7 @@ class Writer(object):
                     self._equation(b, "Convection", equation.Convection)
                 if equation.MagneticInduction is True:
                     self._equation(b, "Magnetic Induction", equation.MagneticInduction)
- 
+
     #-------------------------------------------------------------------------------------------
     # Flux
 

src/Mod/Path/Data/Threads/sources.txt

@@ -5,4 +5,4 @@ https://www.engineersedge.com/thread_strength/internal_screw_threads_chart.htm
 
 https://www.engineersedge.com/hardware/metric-external-thread-sizes1.htm
 https://www.engineersedge.com/hardware/metric-external-thread-sizes2.htm
-  dMinorMin = dPitchMin - (dMajorMax - dPitchMax) * 0.948 
+  dMinorMin = dPitchMin - (dMajorMax - dPitchMax) * 0.948

src/Mod/TechDraw/Gui/TaskLeaderLine.cpp

@@ -443,7 +443,7 @@ void TaskLeaderLine::removeFeature()
         if (Gui::Command::hasPendingCommand()) {
             std::vector<std::string> undos = Gui::Application::Instance->activeDocument()->getUndoVector();
             Gui::Application::Instance->activeDocument()->undo(1);
-        } 
+        }
     }
 }
 

src/Mod/TechDraw/TDTest/DrawViewDetailTest.py

@@ -69,7 +69,7 @@ class DrawViewDetailTest(unittest.TestCase):
         loop.exec_()
 
         edges = detail.getVisibleEdges()
-        
+
         self.assertEqual(len(edges), 4, "DrawViewDetail has wrong number of edges")
         self.assertTrue("Up-to-date" in detail.State, "DrawViewDetail is not Up-to-date")