Cleanup: quiet check_spelling_* targets

Also correct outdated references to `ghash`.

doc/python_api/examples/blf.py

@@ -18,7 +18,7 @@ font_info = {
 def init():
     """init function - runs once"""
     import os
-    # Create a new font object, use external ttf file.
+    # Create a new font object, use external TTF file.
     font_path = bpy.path.abspath('//Zeyada.ttf')
     # Store the font indice - to use later.
     if os.path.exists(font_path):

doc/python_api/examples/bpy.types.Depsgraph.5.py

@@ -11,7 +11,7 @@ animation or modifiers into account:
 
 - For meshes this is similar to duplicating the source mesh.
 - For curves this disables own modifiers, and modifiers of objects used as bevel and taper.
-- For metaballs this produces an empty mesh since polygonization is done as a modifier evaluation.
+- For meta-balls this produces an empty mesh since polygonization is done as a modifier evaluation.
 
 When is used on evaluated object all modifiers are taken into account.
 

doc/python_api/examples/mathutils.Vector.py

@@ -12,7 +12,7 @@ vec2d = mathutils.Vector((1.0, 2.0))
 vec3d = mathutils.Vector((1.0, 0.0, 0.0))
 vec4d = vec_a.to_4d()
 
-# other mathutuls types
+# Other `mathutils` types.
 quat = mathutils.Quaternion()
 matrix = mathutils.Matrix()