AddonManager: tooltips and minor code formatting

src/Mod/AddonManager/AddonManagerOptions.ui

@@ -17,7 +17,9 @@
    <item>
     <widget class="QCheckBox" name="checkUpdates">
      <property name="toolTip">
-      <string>If this option is checked, when launching the Addon Manager, installed addons will be checked for available updates (requires the python-git package installed on your system)</string>
+      <string>If this option is selected, when launching the Addon Manager,
+installed addons will be checked for available updates
+(this requires the python-git package installed on your system)</string>
      </property>
      <property name="text">
       <string>Automatically check for updates at start (requires python-git)</string>
@@ -34,7 +36,8 @@
    <item>
     <widget class="QTextEdit" name="customRepositories">
      <property name="toolTip">
-      <string>You can use this window to specify additional addon repositories to be scanned for available addons</string>
+      <string>You can use this window to specify additional addon repositories
+sto be scanned for available addons</string>
      </property>
     </widget>
    </item>

src/Mod/AddonManager/addonmanager_workers.py

@@ -39,16 +39,24 @@ from addonmanager_macro import Macro
 #  \ingroup ADDONMANAGER
 #  \brief Multithread workers for the addon manager
 
-MACROS_BLACKLIST = ["BOLTS","WorkFeatures","how to install","PartsLibrary","FCGear"]
-OBSOLETE = ["assembly2","drawing_dimensioning","cura_engine"] # These addons will print an additional message informing the user
+# Blacklisted addons
+MACROS_BLACKLIST = ["BOLTS",
+                    "WorkFeatures",
+                    "how to install",
+                    "PartsLibrary",
+                    "FCGear"]
+
+# These addons will print an additional message informing the user
+OBSOLETE =         ["assembly2",
+                    "drawing_dimensioning",
+                    "cura_engine"]
+
 NOGIT = False # for debugging purposes, set this to True to always use http downloads
 
 
-
 """Multithread workers for the Addon Manager"""
 
 
-
 class UpdateWorker(QtCore.QThread):
     """This worker updates the list of available workbenches"""
 
@@ -278,7 +286,7 @@ class FillMacroListWorker(QtCore.QThread):
         """Retrieve macros from the wiki
 
         Read the wiki and emit a signal for each found macro.
-        Reads only the page https://www.freecadweb.org/wiki/Macros_recipes.
+        Reads only the page https://www.freecadweb.org/wiki/Macros_recipes
         """
 
         self.info_label_signal.emit("Downloading list of macros from the FreeCAD wiki...")