Change regex expression only to match #[multilib] string (#1364)

* Changed regex expression only to match [multilib] string

* Update multilib regex expression

* Update regex expression

Add raw string format

archinstall/lib/installer.py

@@ -325,7 +325,7 @@ class Installer:
 
 	def enable_multilib_repository(self):
 		# Set up a regular expression pattern of a commented line containing 'multilib' within []
-		pattern = re.compile("^#\\[.*multilib.*\\]$")
+		pattern = re.compile(r"^#\s*\[multilib\]$")
 
 		# This is used to track if the previous line is a match, so we end up uncommenting the line after the block.
 		matched = False