Update the example

Author: afvincent

examples/api/engineering_formatter.py

@@ -25,16 +25,17 @@
     ax.set_xscale('log')
 
 # Demo of the default settings, with a user-defined unit label.
-ax0.set_title('Full unit ticklabels, w/ default precision & space sep.')
+ax0.set_title('Full unit ticklabels, w/ default precision & space separator')
 formatter0 = EngFormatter(unit='Hz')
 ax0.xaxis.set_major_formatter(formatter0)
 ax0.plot(xs, ys)
 ax0.set_xlabel('Frequency')
 
 # Demo of the options `places` (number of digit after decimal point) and
-# `space_sep` (presence of a space between the number and the prefix/unit).
-ax1.set_title('SI-prefix only ticklabels, 1-digit precision & w/o space sep.')
-formatter1 = EngFormatter(places=1, space_sep=False)
+# `sep` (separator between the number and the prefix/unit).
+ax1.set_title('SI-prefix only ticklabels, 1-digit precision & ' +
+              'hair space separator')
+formatter1 = EngFormatter(places=1, sep=u"\u200a")  # U+200A is hair space
 ax1.xaxis.set_major_formatter(formatter1)
 ax1.plot(xs, ys)
 ax1.set_xlabel('Frequency [Hz]')