Fix docstring display.

gui/qt/main_window.py

@@ -2583,11 +2583,14 @@ class ElectrumWindow(QMainWindow, PrintError):
         nz.valueChanged.connect(on_nz)
         gui_widgets.append((nz_label, nz))
 
+        def fmt_docs(key, klass):
+            lines = [ln.lstrip(" ") for ln in klass.__doc__.split("\n")]
+            return '\n'.join([key, "", " ".join(lines)])
+
         choosers = sorted(COIN_CHOOSERS.keys())
         chooser_name = self.wallet.coin_chooser_name(self.config)
         msg = _('Choose coin (UTXO) selection method.  The following are available:\n\n')
-        msg += '\n\n'.join(key + ": " + klass.__doc__
+        msg += '\n\n'.join(fmt_docs(*item) for item in COIN_CHOOSERS.items())
-                         for key, klass in COIN_CHOOSERS.items())
         chooser_label = HelpLabel(_('Coin selection') + ':', msg)
         chooser_combo = QComboBox()
         chooser_combo.addItems(choosers)

lib/coinchooser.py

@@ -117,10 +117,9 @@ class CoinChooserBase(PrintError):
         return tx
 
 class CoinChooserClassic(CoinChooserBase):
-    '''
+    '''The classic electrum algorithm.  Chooses coins starting with the
-    The classic electrum algorithm.  Chooses coins starting with
+    oldest that are sufficient to cover the spent amount, and then
-    the oldest that are sufficient to cover the spent amount, and
+    removes any unneeded starting with the smallest in value.'''
-    then removes any unneeded starting with the smallest in value.'''
 
     def keys(self, coins):
         return [coin['prevout_hash'] + ':' + str(coin['prevout_n'])
@@ -179,19 +178,18 @@ class CoinChooserRandom(CoinChooserBase):
         return winner
 
 class CoinChooserPrivacy(CoinChooserRandom):
-    '''
+    '''Attempts to better preserve user privacy.  First, if any coin is
-    Attempts to better preserve user privacy.  First, if any coin is
     spent from a user address, all coins are.  Compared to spending
     from other addresses to make up an amount, this reduces
     information leakage about sender holdings.  It also helps to
-    reduce blockchain UTXO bloat, and reduce future privacy loss
+    reduce blockchain UTXO bloat, and reduce future privacy loss that
-    that would come from reusing that address' remaining UTXOs.
+    would come from reusing that address' remaining UTXOs.  Second, it
-    Second, it penalizes change that is quite different to the sent
+    penalizes change that is quite different to the sent amount.
-    amount.  Third, it penalizes change that is too big. Fourth, it
+    Third, it penalizes change that is too big. Fourth, it breaks
-    breaks large change up into amounts comparable to the spent
+    large change up into amounts comparable to the spent amount.
-    amount.  Finally, change is rounded to similar precision to
+    Finally, change is rounded to similar precision to sent amounts.
-    sent amounts.  Extra change outputs and rounding might raise
+    Extra change outputs and rounding might raise the transaction fee
-    the transaction fee slightly'''
+    slightly.'''
 
     def keys(self, coins):
         return [coin['address'] for coin in coins]