Aditional ":" added, minor list alignments

examples/GraphicsLayout.py

@@ -20,6 +20,8 @@ view.show()
 view.setWindowTitle('pyqtgraph example: GraphicsLayout')
 view.resize(800,600)
 
+
+
 ## Title at top
 text = """
 This example demonstrates the use of GraphicsLayout to arrange items in a grid.<br>

pyqtgraph/graphicsItems/GradientEditorItem.py

@@ -349,7 +349,7 @@ class GradientEditorItem(TickSliderItem):
     with a GradientEditorItem that can be added to a GUI. 
     
     ================================ ===========================================================
-    **Signals**
+    **Signals:**
     sigGradientChanged(self)         Signal is emitted anytime the gradient changes. The signal 
                                      is emitted in real time while ticks are being dragged or 
                                      colors are being changed.

pyqtgraph/graphicsItems/InfiniteLine.py

@@ -15,7 +15,7 @@ class InfiniteLine(GraphicsObject):
     This line may be dragged to indicate a position in data coordinates.
     
     =============================== ===================================================
-    **Signals**
+    **Signals:**
     sigDragged(self)
     sigPositionChangeFinished(self)
     sigPositionChanged(self)
@@ -28,7 +28,7 @@ class InfiniteLine(GraphicsObject):
     
     def __init__(self, pos=None, angle=90, pen=None, movable=False, bounds=None):
         """
-        ==============  ==================================================================
+        =============== ==================================================================
         **Arguments:**
         pos             Position of the line. This can be a QPointF or a single value for
                         vertical/horizontal lines.
@@ -39,7 +39,7 @@ class InfiniteLine(GraphicsObject):
         movable         If True, the line can be dragged to a new position by the user.
         bounds          Optional [min, max] bounding values. Bounds are only valid if the
                         line is vertical or horizontal.
-        =============   ==================================================================
+        =============== ==================================================================
         """
         
         GraphicsObject.__init__(self)

pyqtgraph/widgets/ColorButton.py

@@ -11,7 +11,7 @@ class ColorButton(QtGui.QPushButton):
     Button displaying a color and allowing the user to select a new color.
     
     ====================== ============================================================
-    **Signals**:
+    **Signals:**
     sigColorChanging(self) emitted whenever a new color is picked in the color dialog
     sigColorChanged(self)  emitted when the selected color is accepted (user clicks OK)
     ====================== ============================================================