Some inner letters are uppercase when using titlecase

Titlecase has an allow list of known acronyms that alwasys remain all uppercase. They were being matched within words though, so "previous" became "PrevIOUs" (since IOU is uppercase).

Changed the match to only occur on word boundaries.

changecase.py

@@ -15,9 +15,9 @@
 if len(text.strip()) == 0:
     sys.exit(0)
 
-always_uppercase = r'''\bXML|HTML|CSS|JSON|FYI|AOL|ATM|BBC|CD|FAQ|GAIM|GNU|GTK|HIRD|HIV
-  |HURD|IEEE|IOU|IRA|IUPAC|JPEG|LCD|NAACP|NAC|NATO|NCAA|NOAD|OEM|PHP|ROM|SAT|SFMOMA|SQL|USA|VHDL|VHSIC|W3C
-  |LOL|WTF\b'''
+always_uppercase = r'''\b(?:XML|HTML|CSS|JSON|FYI|AOL|ATM|BBC|CD|FAQ|GAIM|GNU|GTK|HIRD|HIV
+	|HURD|IEEE|IOU|IRA|IUPAC|JPEG|LCD|NAACP|NAC|NATO|NCAA|NOAD|OEM|PHP|ROM|SAT|SFMOMA|SQL|USA|VHDL|VHSIC|W3C
+	|LOL|WTF)\b'''
 always_uppercase_re = re.compile(always_uppercase, re.I | re.X)