Fix parsing floats with no number trailing the .

Fixes vim-python#41

Author: nfnty

syntax/python.vim

@@ -327,7 +327,7 @@ else
 
   syn match   pythonFloat       '\.\d\%([_0-9]*\d\)\=\%([eE][+-]\=\d\%([_0-9]*\d\)\=\)\=[jJ]\=\>' display
   syn match   pythonFloat       '\<\d\%([_0-9]*\d\)\=[eE][+-]\=\d\%([_0-9]*\d\)\=[jJ]\=\>' display
-  syn match   pythonFloat       '\<\d\%([_0-9]*\d\)\=\.\d\%([_0-9]*\d\)\=\%([eE][+-]\=\d\%([_0-9]*\d\)\=\)\=[jJ]\=' display
+  syn match   pythonFloat       '\<\d\%([_0-9]*\d\)\=\.\d\=\%([_0-9]*\d\)\=\%([eE][+-]\=\d\%([_0-9]*\d\)\=\)\=[jJ]\=' display
 endif
 
 "

tests/test.py

@@ -186,7 +186,7 @@ async def Test
 
 # Numbers
 
-0 1 2 9 10 0x1f .3 12.34 0j 124j 34.2E-3 0b10 0o77 1023434 0x0
+0 1 2 9 10 0x1f 1. .3 12.34 0j 124j 34.2E-3 0b10 0o77 1023434 0x0
 1_1 1_1.2_2 1_2j 0x_1f 0x1_f 34_56e-3 34_56e+3_1 0o7_7
 
 # Erroneous numbers