Update chapter3-exercise-soft-hyphens-tests.md

tests/chapter3-exercise-soft-hyphens-tests.md

@@ -43,7 +43,7 @@ If the word fits without splitting then no literal hyphens are present.
 When a soft hyphen is replaced with a literal hyphen you need to check that the
   text with the hyphen fits on the line.
 
-    >>> browser.WIDTH = 90
+    >>> browser.set_parameters(WIDTH=90)
     >>> test_layout("a\N{soft hyphen}b\N{soft hyphen}c\N{soft hyphen}d\N{soft hyphen}e") #doctest: +NORMALIZE_WHITESPACE
     [(13.0, 21.0, 'abc-', Font size=16 weight=normal slant=roman style=None), 
      (13.0, 41.0, 'de', Font size=16 weight=normal slant=roman style=None)]
@@ -51,7 +51,7 @@ When a soft hyphen is replaced with a literal hyphen you need to check that the
 
 Sometimes a word may be so long that it needs to be split multiple times.
 
-    >>> browser.WIDTH = 122
+    >>> browser.set_parameters(WIDTH=122)
     >>> test_layout("multi\N{soft hyphen}word\N{soft hyphen}split") #doctest: +NORMALIZE_WHITESPACE
     [(13.0, 21.0, 'multi-', Font size=16 weight=normal slant=roman style=None), 
      (13.0, 41.0, 'word-', Font size=16 weight=normal slant=roman style=None),