Remove strange exclamation mark from 'sample' example

Author: ethancrawford

app/server/sonicpi/lib/sonicpi/mods/sound.rb

@@ -2225,7 +2225,7 @@ def sample(path, *args_a_or_h)
 
 
           examples:      ["
-!sample :perc_bell # plays one of Sonic Pi's built in samples",
+sample :perc_bell # plays one of Sonic Pi's built in samples",
         "sample '/home/yourname/path/to/a/sample.wav' # plays a wav|wave|aif|aiff file from your local filesystem",
         "# Let's play with the rate parameter
 # play one of the included samples