Fix up some f-string inconsistencies and Makefile targets

Author: pjkundert

Makefile

@@ -445,7 +445,7 @@ $(WHEEL):		install-dev FORCE
 install:		$(WHEEL) FORCE
 	$(PYTHON) -m pip install --no-user --force-reinstall $<[$(MIN)]
 
-install-all:
+install-all:		$(WHEEL) FORCE
 	$(PYTHON) -m pip install --no-user --force-reinstall $<[$(ALL)]
 
 install-%:  # ...-dev, -tests, -gui, -serial, -wallet, -invoice

slip39/util.py

@@ -317,7 +317,7 @@ def int_seq( seq ):
         end			= seq[nxt:] if nxt < len( seq ) else []
         seq			= beg + [f"{seq[rng[0]]}-{seq[rng[1]]}"] + end
     if final and len(seq) > 1:
-        seq			= seq[:-2] + [f"{seq[-2]} {final} {seq[-1]}"]
+        seq			= seq[:-2] + [f" {final} ".join( map( str, seq[-2:] ))]
     return ', '.join( map( str, seq ))
 
 
@@ -554,7 +554,7 @@ class mixed_fraction( Fraction ):
     def __str__( self ):
         whole, rest		= divmod( self.numerator, self.denominator )
         if whole and rest:
-            return f"{whole}+{Fraction( rest, self.denominator)}"
+            return f"{whole}+{Fraction( rest, self.denominator )}"
         return super().__str__()