title: Pyplot contour plot - clabel spacing
body: <p>I have trouble with matplotlib / pyplot / basemap. I plot contour lines (air pressure) on a map. I use clabel to show the value of the contour lines. 
  But the problem is: the padding between the value and the contour line is too much. I have found the parameter "inline_spacing", which i have set to zero. But there is still to much free space. Any ideas?</p>
  
  <p><img src="https://i.stack.imgur.com/7QROI.png" alt="free space contour label"></p>
  
  <p>Python Code:</p>
  
  <pre><code>import matplotlib
  matplotlib.use('Agg')
  import matplotlib.pyplot as plt
  from mpl_toolkits.basemap import Basemap
  import pygrib
  
  filename   = "file.grib2"
  grbs       = pygrib.open('/data/' + filename)
  grb        = grbs[2]
  data       = grb.values
  datac      = data*0.01
  lats, lons = grb.latlons()
  
  fig = plt.figure()
  m = Basemap(projection='stere',lon_0=5,lat_0=90.0,\
              llcrnrlon=-25.0,urcrnrlon=60.0,llcrnrlat=30.0,urcrnrlat=60.0,resolution='l')
  
  x, y = m(lons, lats)
  
  levs = range(940,1065,5)
  S1=plt.contour(x,y,datac,levs,linewidths=0.5,colors='b')
  plt.clabel(S1,inline=1,inline_spacing=0,fontsize=8,fmt='%1.0f',colors='b')
  
  m.drawmapboundary(fill_color='w')
  m.drawcoastlines(linewidth=0.2)
  
  plt.savefig('test.png', bbox_inches='tight',pad_inches=0.05, dpi=100)
  </code></pre>
  
  <p>Thanks.</p>