STY: Fix formatting and use tight_layout in doc examples.

doc/examples/transform/plot_radon_transform.py

@@ -31,9 +31,9 @@ Technique (SART).
 
 For further information on tomographic reconstruction, see
 
-    - AC Kak, M Slaney, "Principles of Computerized Tomographic Imaging",
-      http://www.slaney.org/pct/pct-toc.html
-    - http://en.wikipedia.org/wiki/Radon_transform
+- AC Kak, M Slaney, "Principles of Computerized Tomographic Imaging",
+  http://www.slaney.org/pct/pct-toc.html
+- http://en.wikipedia.org/wiki/Radon_transform
 
 The forward transform
 =====================
@@ -73,7 +73,7 @@ ax2.set_ylabel("Projection position (pixels)")
 ax2.imshow(sinogram, cmap=plt.cm.Greys_r,
            extent=(0, 180, 0, sinogram.shape[0]), aspect='auto')
 
-fig.subplots_adjust(hspace=0.4, wspace=0.5)
+fig.tight_layout()
 plt.show()
 
 """
@@ -101,7 +101,9 @@ error = reconstruction_fbp - image
 print('FBP rms reconstruction error: %.3g' % np.sqrt(np.mean(error**2)))
 
 imkwargs = dict(vmin=-0.2, vmax=0.2)
-fig, (ax1, ax2) = plt.subplots(1, 2, figsize=(8, 4.5), sharex=True, sharey=True, subplot_kw={'adjustable':'box-forced'})
+fig, (ax1, ax2) = plt.subplots(1, 2, figsize=(8, 4.5),
+                               sharex=True, sharey=True,
+                               subplot_kw={'adjustable': 'box-forced'})
 ax1.set_title("Reconstruction\nFiltered back projection")
 ax1.imshow(reconstruction_fbp, cmap=plt.cm.Greys_r)
 ax2.set_title("Reconstruction error\nFiltered back projection")
@@ -152,7 +154,8 @@ error = reconstruction_sart - image
 print('SART (1 iteration) rms reconstruction error: %.3g'
       % np.sqrt(np.mean(error**2)))
 
-fig, ax = plt.subplots(2, 2, figsize=(8, 8.5), sharex=True, sharey=True, subplot_kw={'adjustable':'box-forced'})
+fig, ax = plt.subplots(2, 2, figsize=(8, 8.5), sharex=True, sharey=True,
+                       subplot_kw={'adjustable': 'box-forced'})
 ax1, ax2, ax3, ax4 = ax.ravel()
 ax1.set_title("Reconstruction\nSART")
 ax1.imshow(reconstruction_sart, cmap=plt.cm.Greys_r)