add waitfd name substitution

plot_utils.py

@@ -2,6 +2,7 @@ import re
 
 PATTERNS = {}
 PATTERNS['emper'] = (re.compile('^emper'), '\\\\emper{}')
+PATTERNS['waitfd'] = (re.compile('^waitfd'), '\\\\waitfd{}')
 PATTERNS['go'] = (re.compile('^go'), 'Go')
 PATTERNS['tokio'] = (re.compile('^tokio'), 'Tokio')